0001628280-24-023431 | 10-Q | XBRL Viewer

Restructuring and Related Activities (Details)	3 Months Ended	4 Months Ended	12 Months Ended
Restructuring and Related Activities (Details)	Mar. 31, 2024 USD ($)	Apr. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Restructuring and Related Activities [Abstract]
Restructuring and Related Cost, Number of Positions Eliminated	10
Severance Costs	$ 580,427
Restructuring Cost and Reserve [Line Items]
Severance Costs	580,427
Restructuring Reserve	555,000			$ 0
Majority of Reduction Employees \| Forecast
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring		$ 207,000
Two Reduction Employees with Extended Agreement \| Forecast
Restructuring Cost and Reserve [Line Items]
Payments for Restructuring			$ 348,000
Research and Development Expense [Member]
Restructuring and Related Activities [Abstract]
Severance Costs	310,200
Restructuring Cost and Reserve [Line Items]
Severance Costs	310,200
Selling and Marketing Expense [Member]
Restructuring and Related Activities [Abstract]
Severance Costs	234,527
Restructuring Cost and Reserve [Line Items]
Severance Costs	234,527
General and Administrative Expense [Member]
Restructuring and Related Activities [Abstract]
Severance Costs	4,200
Restructuring Cost and Reserve [Line Items]
Severance Costs	4,200
Cost of Sales
Restructuring and Related Activities [Abstract]
Severance Costs	31,500
Restructuring Cost and Reserve [Line Items]
Severance Costs	31,500
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	555,000
Payments for Restructuring	$ 25,427

Net Loss Per Common Share Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ (3,029,574)	$ (1,574,174)
Weighted Average Number of Shares Outstanding, Basic	1,812,455	961,153
Weighted Average Number of Shares Outstanding, Diluted	1,812,455	961,153
Earnings Per Share, Diluted	$ (1.67)	$ (1.64)
Earnings Per Share, Basic	$ (1.67)	$ (1.64)

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Comprehensive Loss (Detail) - USD ($)	3 Months Ended
Comprehensive Loss (Detail) - USD ($)	Mar. 31, 2024	Mar. 31, 2023
Equity [Abstract]
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent		$ 65,874
Net Income (Loss) Attributable to Parent	$ 3,029,574	1,574,174
Other Comprehensive Income (Loss), before Tax	$ 7,006	$ 65,874

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

Amount before tax, after reclassification adjustments of other comprehensive income (loss).

+ References + Details

Comprehensive Loss	3 Months Ended
Comprehensive Loss	Mar. 31, 2024
Equity [Abstract]
Comprehensive Loss	Comprehensive Income (Loss) For the quarter ended March 31, 2024, the Company had comprehensive income of $7,006 for net unrealized gains on AFS, in addition to net loss of $3,029,574 in the statements of operations. The Company had comprehensive income of $65,874 for net unrealized gains on AFS, in addition to net loss of $1,574,174 in the statements of operations for the quarter ended March 31, 2023.

Net Loss Per Common Share

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Net Loss Per Common Share

3. Net Loss Per Common Share

Basic and dilutive net loss per common share were as follows:


	Quarters Ended March 31,
	2024		2023
Net loss applicable to common stockholders	$	(3,029,574)	$	(1,574,174)



Weighted average number of common shares outstanding, basic and diluted	1,812,455		961,153

Net loss per common share applicable to common stockholders, basic and diluted	$	(1.67)	$	(1.64)

Shares underlying the following potentially dilutive weighted average number of common stock equivalents were excluded from the calculation of diluted net loss per common share because their effect was anti-dilutive for each of the periods presented:


	Quarters Ended March 31,
	2024	2023
Options	63,755	65,683
Unvested restricted stock awards	3,201	10,745
Unvested restricted stock units	48,565	22,477
Convertible preferred stock	8	8
Total	115,529	98,913

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]


	Quarters Ended March 31,
	2024		2023
Net loss applicable to common stockholders	$	(3,029,574)	$	(1,574,174)



Weighted average number of common shares outstanding, basic and diluted	1,812,455		961,153

Net loss per common share applicable to common stockholders, basic and diluted	$	(1.67)	$	(1.64)

Statement of Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Schedule of Stock by Class [Table Text Block]

Preferred stock and convertible preferred stock consist of the following:


	March 31, 2024		December 31, 2023
Preferred stock, $0.001 par value; 5,000,000 shares authorized at March 31, 2024 and December 31, 2023; no shares issued and outstanding at March 31, 2024 and December 31, 2023	$	—	$	—
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at March 31, 2024 and December 31, 2023; 200 shares issued and outstanding at March 31, 2024 and December 31, 2023	$	1	$	1

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27))
-SubTopic 10
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Paragraph 1
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Paragraph 1
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-URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org//1943274/2147481112/505-10-50-7

+ Details

Label	Element	Value
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 1,731,946
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 4,335,020

Accrued Expenses

3 Months Ended

Mar. 31, 2024

Payables and Accruals [Abstract]

Accrued Expenses

Accrued Expenses and Compensation

Accrued expenses and compensation consist of the following:


	March 31, 2024		December 31, 2023
Professional services	$	547,498	$	298,534
Compensation	202,424		346,245
Severance	555,000		—
Clinical	37,383		39,000
Warranty	8,000		9,400


Sales Tax	143,185		141,672
Other	60,736		41,888



	$	1,554,226	$	876,739

In the first quarter of 2024, the Company recorded a $50,000 estimated liability included in "Other" in the table above, associated with additional costs expected to be incurred related to a discontinued product line within cost of revenues. In addition the Company recorded a severance accrual of $555,000, see note 10 for additional details.

Investments, Debt and Equity Securities (Details) - AFS - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale	$ 16,339,180	$ 16,265,205	$ 16,265,205
Debt Securities, Available-for-Sale, Amortized Cost	16,092,003		16,025,034
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	248,164		240,171
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(987)
Commercial Paper
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale	8,445,145	$ 11,846,605	11,846,605
Debt Securities, Available-for-Sale, Amortized Cost	8,249,644		11,612,099
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	196,488		234,506
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	(987)
US Government Agencies Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale	7,894,035		4,418,600
Debt Securities, Available-for-Sale, Amortized Cost	7,842,359		4,412,935
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	$ 51,676		$ 5,665

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Section 50
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Section 50
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Section 50
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-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Section 50
-Paragraph 3
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

+ Details

Leases Leases (Notes)

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Lessee, Operating Leases [Text Block]

. Operating Leases

The Company's lease on its Woburn, Massachusetts corporate office and manufacturing facilities extends through mid September 2025 at a monthly base rent of $13,846 and with a 5-year extension option.

The following is a maturity analysis of the annual cash flows of the operating lease liabilities as of March 31, 2024:







2024	$	124,339
2025	117,431
Total minimum lease payments	$	241,770

Discount rate, 15%	$	32,433
Lease obligation, current portion	148,391
Lease obligation, net of current portion	60,946
	$	241,770

Total recorded rent expense was $50,377 and $49,232, for the quarters ended March 31, 2024 and 2023, respectively. The Company records rent expense on its facility leases on a straight-line basis over the lease term. The remaining operating lease term was 1.5 years as of March 31, 2024.

Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
Statements of Cash Flows (Unaudited) - USD ($)	Mar. 31, 2024	Mar. 31, 2023
Statement of Cash Flows [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (3,029,574)	$ (1,574,174)
Depreciation, Depletion and Amortization	24,908	10,222
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	216,164	165,361
Debt Securities, Available-for-Sale, Realized Gain	(205,255)	0
Changes in operating assets and liabilities:
Accounts receivable	49,174	70,490
Inventories	13,781	(196,548)
Prepaid expenses and other current and long-term assets	108,661	78,467
Accounts payable	(70,956)	32,217
Accrued expenses and compensation	737,487	338,326
Net Cash Provided by (Used in) Operating Activities	(2,081,401)	(1,121,417)
Payments to Acquire Debt Securities, Available-for-Sale	7,361,714	9,336,984
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale	7,500,000	0
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities	138,286	(836,984)
Cash flows from financing activities:
Net proceeds from issuance of stock and warrants	1,471,099	0
Net Cash Provided by (Used in) Financing Activities	1,471,099	0
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(472,016)	(1,958,401)
Cash and cash equivalents, end of period	1,259,930
Supplemental disclosure of cash flow information:
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,259,930	2,376,619
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities	0	8,500,000
Inventory Charge Cost of Revenues	74,209	63,420
Investment Income, Net, Amortization of Discount and Premium	$ 0	$ 109,198

Stockholders' Equity

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Preferred stock and convertible preferred stock consist of the following:


	March 31, 2024		December 31, 2023
Preferred stock, $0.001 par value; 5,000,000 shares authorized at March 31, 2024 and December 31, 2023; no shares issued and outstanding at March 31, 2024 and December 31, 2023	$	—	$	—
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at March 31, 2024 and December 31, 2023; 200 shares issued and outstanding at March 31, 2024 and December 31, 2023	$	1	$	1

2024 equity activity

In January and February 2024, the Company issued 458,380 shares of its common stock, under an at-the-market ("ATM") program for net proceeds of $1,471,099. As of April 18, 2024, the Company terminated the ATM program.

In March 2024, 1,015 restricted stock awards and 5,912 restricted stock units were forfeited due to the employee reduction described in Note 10. As of March 31, 2024, the Company had 3,201 restricted stock awards and 48,565 restricted stock units that remain unvested. At December 31, 2023 the Company had 6,222 restricted stock awards and 60,492 restricted stock units that were unvested.

2023 equity activity

As of March 31, 2023, the Company had 10,745 restricted stock awards and 22,476 restricted stock units that remain unvested.

- Definition

The entire disclosure for equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-13

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//505/tableOfContent

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Sales and Excise Tax Payable, Current	$ 143,185	$ 141,672
Professional services	547,498	298,534
Accrued Salaries, Current	202,424	346,245
Restructuring Reserve	555,000	0
Accrued Clinical Current	37,383	39,000
Warranty reserve	8,000	9,400
Other	60,736	41,888
Accrued expenses	1,554,226	$ 876,739
ADVANCE Inventory \| Cost of Sales
Accrued Expenses Table [Line Items]
Increase (Decrease) in Accrued Liabilities	$ 50,000

Investments, Debt and Equity Securities

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure

4. Securities

The Company's marketable debt securities are classified as either HTM or AFS pursuant to ASC 320 - Investments - Debt Securities. HTM securities are valued at amortized cost. The following table summarizes the valuations and unrealized gains and losses of AFS securities which are recorded at estimated fair value as of March 31, 2024 and December 31, 2023.


	March 31, 2024
			Gross Unrealized
Available-for-sale securities	Cost		Gains		Losses		Credit Losses		Estimated Fair Value
U.S. government bonds	$	7,842,359	$	51,676	$	—	$	—	$	7,894,035

Commercial paper	8,249,644		196,488		(987)		—		8,445,145
Total	$	16,092,003	$	248,164	$	(987)	$	—	$	16,339,180


	December 31, 2023
			Gross Unrealized
Available-for-sale securities	Cost		Gains		Losses		Credit Losses		Estimated Fair Value
U.S. government bonds	$	4,412,935	$	5,665	$	—	$	—	$	4,418,600

Commercial paper	11,612,099		234,506		—		—		$	11,846,605
Total	$	16,025,034	$	240,171	$	—	$	—	$	16,265,205

The Company evaluates all HTM and AFS securities for impairment at each reporting period. It determined that changes in the fair value of its securities at March 31, 2024 resulted primarily from interest rate fluctuations subsequent to the purchase date of the securities. There was no deterioration in the credit worthiness of the issuers and no credit losses were recorded as of March 31, 2024.

Leases Leases (Tables)

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Lessee, Operating Lease, Liability, Maturity [Table Text Block]







2024	$	124,339
2025	117,431
Total minimum lease payments	$	241,770

Discount rate, 15%	$	32,433
Lease obligation, current portion	148,391
Lease obligation, net of current portion	60,946
	$	241,770

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring and Nonrecurring Basis


	March 31, 2024
	Total		Level 1		Level 2		Level 3
Assets:
Money market funds	$	1,255,736	$	1,255,736	$	—	$	—
U.S. government bonds	7,894,035		7,894,035		—		—
Commercial paper	8,445,145		—		8,445,145		—
Total	$	17,594,916	$	9,149,771	$	8,445,145	$	—


	December 31, 2023
	Total		Level 1		Level 2		Level 3
Assets:
Money market funds	$	1,284,290	$	1,284,290	$	—	$	—
U.S. government bonds	4,418,600		4,418,600		—		—
Commercial paper	11,846,605		—		11,846,605		—
Total	$	17,549,495	$	5,702,890	$	11,846,605	$	—

Inventories (Detail) - USD ($)	3 Months Ended
Inventories (Detail) - USD ($)	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Inventory [Line Items]
Purchased components	$ 1,093,201		$ 1,151,381
Finished goods	378,237		408,047
Inventories	1,471,438		$ 1,559,428
Inventory Charge Cost of Revenues	74,209	$ 63,420
ADVANCE Inventory
Inventory [Line Items]
Inventory Charge Cost of Revenues	$ 74,209
Inventory Valuation and Obsolescence
Inventory [Line Items]
Inventory Charge Cost of Revenues		$ 63,420

Inventories

3 Months Ended

Mar. 31, 2024

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following:


	March 31, 2024		December 31, 2023
Purchased components	$	1,093,201	$	1,151,381

Finished goods	378,237		408,047
	$	1,471,438	$	1,559,428

In the first quarter of 2024, the Company recorded a charge of $74,209 to write down the value of ADVANCE inventory within cost of revenues on the Company's statement of operations. The Company also recorded a charge of $63,420 in the first quarter of 2023 to reduce the carrying value of inventory to net realizable value.

Statement of Comprehensive Income (Statement) - USD ($)	3 Months Ended
Statement of Comprehensive Income (Statement) - USD ($)	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (3,022,568)	$ (1,508,300)
Net Income (Loss) Attributable to Parent	(3,029,574)	(1,574,174)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	212,261	65,874
Other Comprehensive Income Realized Gain Adjustment	$ (205,255)	$ 0

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Accrued Expenses (Tables)

3 Months Ended

Mar. 31, 2024

Payables and Accruals [Abstract]

Schedule of Accrued Expenses

Accrued expenses and compensation consist of the following:


	March 31, 2024		December 31, 2023
Professional services	$	547,498	$	298,534
Compensation	202,424		346,245
Severance	555,000		—
Clinical	37,383		39,000
Warranty	8,000		9,400


Sales Tax	143,185		141,672
Other	60,736		41,888



	$	1,554,226	$	876,739

Investments, Debt and Equity Securities (Tables)

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-Sale Securities Reconciliation

The following table summarizes the valuations and unrealized gains and losses of AFS securities which are recorded at estimated fair value as of March 31, 2024 and December 31, 2023.


	March 31, 2024
			Gross Unrealized
Available-for-sale securities	Cost		Gains		Losses		Credit Losses		Estimated Fair Value
U.S. government bonds	$	7,842,359	$	51,676	$	—	$	—	$	7,894,035

Commercial paper	8,249,644		196,488		(987)		—		8,445,145
Total	$	16,092,003	$	248,164	$	(987)	$	—	$	16,339,180


	December 31, 2023
			Gross Unrealized
Available-for-sale securities	Cost		Gains		Losses		Credit Losses		Estimated Fair Value
U.S. government bonds	$	4,412,935	$	5,665	$	—	$	—	$	4,418,600

Commercial paper	11,612,099		234,506		—		—		$	11,846,605
Total	$	16,025,034	$	240,171	$	—	$	—	$	16,265,205

Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended	2 Months Ended	3 Months Ended
	Mar. 31, 2024	Feb. 29, 2024	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Class of Stock [Line Items]
Net proceeds from issuance of stock and warrants			$ 1,471,099	$ 0
Common stock, par value (in dollars per share)	$ 0.0001		$ 0.0001		$ 0.0001
Stock Issued During Period, Value, Restricted Stock Award, Gross			$ 0	$ 0
Stock Issued During Period, Value, New Issues			$ 1,471,099
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues			458,380
Stock Issued During Period, Shares, Restricted Stock Award, Gross			6,699	2,439
Stock Issued During Period, Value, Restricted Stock Award, Gross			$ 1	$ 0
Stock Issued During Period, Value, New Issues			$ 46
Restricted Stock
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	3,201		3,201	10,745	6,222
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period	1,015
Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	48,565		48,565	22,476	60,492
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period	5,912
At The Market Offering Program [Member] \| Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues		458,380
Proceeds from Issuance of Common Stock		$ 1,471,099

Fair Value Measurements

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value Measurements

5. Fair Value Measurements

The following tables set forth the Company’s financial instruments that were measured at fair value:


	March 31, 2024
	Total		Level 1		Level 2		Level 3
Assets:
Money market funds	$	1,255,736	$	1,255,736	$	—	$	—
U.S. government bonds	7,894,035		7,894,035		—		—
Commercial paper	8,445,145		—		8,445,145		—
Total	$	17,594,916	$	9,149,771	$	8,445,145	$	—


	December 31, 2023
	Total		Level 1		Level 2		Level 3
Assets:
Money market funds	$	1,284,290	$	1,284,290	$	—	$	—
U.S. government bonds	4,418,600		4,418,600		—		—
Commercial paper	11,846,605		—		11,846,605		—
Total	$	17,549,495	$	5,702,890	$	11,846,605	$	—

The Company's accounts receivable, accounts payable, and accrued expenses are valued at cost which approximates fair value.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Net Loss Per Common Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	115,529	98,913
Convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	8	8
Equity Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	63,755	65,683
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	3,201	10,745
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	48,565	22,477

Business and Basis of Presentation (Policies)	3 Months Ended
Business and Basis of Presentation (Policies)	Mar. 31, 2024
Accounting Policies [Abstract]
Unaudited Interim Financial Statements	Unaudited Interim Financial Statements The accompanying unaudited balance sheet as of March 31, 2024, unaudited statements of operations, statements of comprehensive loss, changes in stockholders' equity and cash flows for the quarters ended March 31, 2024 and 2023 have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. The accompanying balance sheet as of December 31, 2023 has been derived from the audited balance sheet as of December 31, 2023 included in the Company's Form 10-K referenced below and does not include all disclosures required by U.S. GAAP. In the opinion of management, the financial statements include all normal and recurring adjustments considered necessary for a fair presentation of the Company’s financial position and operating results. Operating results for the three months ended March 31, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024 or any other period. These financial statements and notes should be read in conjunction with the financial statements for the year ended December 31, 2023 included in the Company’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission (the "SEC"), on March 1, 2024 (File No. 001-33351).
Revenues	Revenues Revenues include product sales, net of estimated returns. Revenue is measured as the amount of consideration the Company expects to receive in exchange for product transferred. Revenue is recognized at the point in time when contractual performance obligations have been satisfied and control of the product has been transferred to the customer. The Company has a single product delivery performance obligation. Accrued product returns using the most likely amount method are estimated based on historical data and evaluation of current information and variable consideration is not constrained. Revenue from product sales that occur via an online pharmacy agent are recognized on a gross basis and the related fulfillment fees are expensed within cost of revenues. Accounts receivable are recorded in the amount the Company expects to collect, net of the allowance for credit losses. The allowance for credit losses is the Company’s best estimate of the amount of probable credit losses based on customer past payment history, product usage activity, and recent communications with the customer. Individual customer balances which are over 90 days past due are reviewed individually for collectability and written-off when recovery is not probable. The Company does not have any off-balance sheet credit exposure related to its customers. Allowance for credit losses was $25,000 as of March 31, 2024 and December 31, 2023. Two customers accounted for 25% and 39% of total revenues in the quarters ended March 31, 2024 and 2023, respectively. Three customers accounted for 64% and 74% of accounts receivable as of March 31, 2024 and December 31, 2023, respectively.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make significant estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during reporting periods. Actual results could differ from those estimates.
Cash and Cash Equivalents, Policy	Cash and Cash Equivalents Cash and cash equivalents include bank demand deposits and money market funds that invest primarily in U.S. government securities.
Marketable Securities, Policy	Securities The Company invests in highly liquid, marketable debt securities with high credit ratings and typically with maturities of two years or less. Individual securities are designated by the Company as either "held-to-maturity" ("HTM") or “available-for-sale” ("AFS") at the point of investment. Securities classified as short-term have maturities of less than one year. As of March 31, 2024, all marketable securities held by the Company are classified as available for sale and had remaining contractual maturities of one year or less. HTM securities are valued on an amortized cost basis and reviewed to determine if an allowance for credit losses should be recorded in the statements of operations. AFS securities are valued at fair value. Unrealized gains and losses on AFS securities are included as a component of accumulated other comprehensive income in the balance sheets and statements of stockholders’ equity and a component of total comprehensive loss in the statements of comprehensive loss. An AFS security is impaired if its fair value is less than amortized cost. Unrealized losses are evaluated to determine if the impairment is credit-related or non credit-related. Credit-related impairment is recognized as an allowance on the balance sheet with a corresponding adjustment to earnings, and a non credit-related impairment is recognized in other comprehensive loss. For certain types of securities, such as U.S. Treasuries, the Company generally expects zero credit losses. No allowance for credit losses was recorded on its securities portfolio as of March 31, 2024 or December 31, 2023.
New Accounting Pronouncements, Policy	Recent Accounting Pronouncements Accounting Standards Updates ("ASUs") issued by the FASB are evaluated for their applicability. ASUs not included in the disclosures in this report were assessed and determined to be either not applicable or not expected to have a material impact on our financial statements. Recently adopted accounting pronouncement In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures, which requires public entities, on an annual basis, to provide disclosures of specific categories in the rate reconciliation, additional information for reconciling items that meet a quantitative threshold and income taxes paid disaggregated by jurisdiction. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The Company is currently evaluating the impact of the adoption of this standard on the Company’s Financial Statements and disclosures.
Fair Value Measurement, Policy	Fair Value The Company follows the provisions of Financial Accounting Standards Board (the "FASB") Accounting Standards Codification ("ASC") Topic 820-10, Fair Value Measurements and Disclosures ("ASC 820-10"), which defines fair value, establishes a framework for measuring fair value in GAAP and requires certain disclosures about fair value measurements. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, ASC 820-10 established a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows: Level 1 observable inputs such as quoted prices in active markets; Level 2 inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3 unobservable inputs for which there are little or no market data, which require the Company to develop its own assumptions. The hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value (See Note 5).

Balance Sheets - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 1,259,930	$ 1,731,946
Debt Securities, Available-for-Sale	16,339,180	16,265,205
Accounts receivable, net	469,650	518,824
Inventories	1,471,438	1,559,428
Prepaid expenses and other current assets	611,735	779,039
Total current assets	20,151,933	20,854,442
Fixed assets, net	268,541	293,449
Operating Lease, Right-of-Use Asset	217,254	250,150
Other Assets, Noncurrent	26,400	26,400
Total assets	20,664,128	21,424,441
Current liabilities:
Accounts payable	144,553	215,509
Accrued expenses and compensation	1,554,226	876,739
Operating Lease, Liability, Current	148,391	148,391
Total current liabilities	1,847,170	1,240,639
Operating Lease, Liability, Noncurrent	60,946	92,485
Total liabilities	1,908,116	1,333,124
Commitments and contingencies
Stockholders’ equity:
Common Stock, Value, Issued	199	152
Additional paid-in capital	231,647,562	229,960,346
Accumulated deficit	(213,138,927)	(210,109,353)
Total stockholders’ equity	18,756,012	20,091,317
Total liabilities and stockholders’ equity	$ 20,664,128	$ 21,424,441
Common Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized	25,000,000	25,000,000
Common Stock, Shares, Issued	1,986,997	1,524,939
Common Stock, Shares, Outstanding	1,986,997	1,524,939
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 247,177	$ 240,171
Convertible preferred stock
Stockholders’ equity:
Preferred stock	1	1
Preferred Non-Convertible Stock
Stockholders’ equity:
Preferred stock	$ 0	$ 0

Net Loss Per Common Share (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]


	Quarters Ended March 31,
	2024		2023
Net loss applicable to common stockholders	$	(3,029,574)	$	(1,574,174)



Weighted average number of common shares outstanding, basic and diluted	1,812,455		961,153

Net loss per common share applicable to common stockholders, basic and diluted	$	(1.67)	$	(1.64)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share


	Quarters Ended March 31,
	2024	2023
Options	63,755	65,683
Unvested restricted stock awards	3,201	10,745
Unvested restricted stock units	48,565	22,477
Convertible preferred stock	8	8
Total	115,529	98,913

Equity Rollforward Statement - USD ($)	Total	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Common Stock [Member]	Preferred Stock Convertible Preferred Stock [Member]	AOCI Attributable to Parent
Stockholders' Equity Attributable to Parent	$ 23,355,687	$ 226,935,456	$ (203,579,866)	$ 96	$ 1	$ 0
Shares, Outstanding				959,460	200
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	165,361	165,361
Stock Issued During Period, Value, Restricted Stock Award, Gross	0	0		$ 0
Stock Issued During Period, Shares, Restricted Stock Award, Gross				2,439
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	65,874
Net Income (Loss) Attributable to Parent	(1,574,174)		(1,574,174)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	65,874					65,874
Other Comprehensive Income Realized Gain Adjustment	0
Stockholders' Equity Attributable to Parent	22,012,748	227,100,817	(205,154,040)	$ 96	$ 1	65,874
Shares, Outstanding				961,899	200
Stockholders' Equity Attributable to Parent	20,091,317	229,960,346	(210,109,353)	$ 152	$ 1	240,171
Shares, Outstanding				1,518,717	200
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	216,164	216,164
Stock Issued During Period, Shares, New Issues				458,380
Stock Issued During Period, Value, New Issues	1,471,099	1,471,053		$ 46
Stock Issued During Period, Value, Restricted Stock Award, Gross	0	(1)		$ 1
Stock Issued During Period, Shares, Restricted Stock Award, Gross				6,699
Net Income (Loss) Attributable to Parent	(3,029,574)		(3,029,574)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	212,261					212,261
Other Comprehensive Income Realized Gain Adjustment	(205,255)					205,255
Stockholders' Equity Attributable to Parent	$ 18,756,012	$ 231,647,562	$ (213,138,927)	$ 199	$ 1	$ 247,177
Shares, Outstanding				1,983,796	200

Document And Entity Information - shares		3 Months Ended
Document And Entity Information - shares	Nov. 21, 2023	Mar. 31, 2024	May 14, 2024
Document Information [Line Items]
Entity Central Index Key		0001289850
Current Fiscal Year End Date		--12-31
Document Fiscal Year Focus		2024
Document Fiscal Period Focus		Q1
Amendment Flag		false
Entity Common Stock, Shares Outstanding			2,011,485
Entity Emerging Growth Company		false
Entity Shell Company		false
Document Type		10-Q
Entity Current Reporting Status		Yes
Entity Small Business		true
Entity Interactive Data Current		Yes
Document Quarterly Report		true
Document Period End Date		Mar. 31, 2024
Document Transition Report		false
Entity File Number		001-33351
Entity Registrant Name		NEUROMETRIX, INC.
Entity Incorporation, State or Country Code		DE
Entity Address, Postal Zip Code		01801
Local Phone Number		890-9989
Entity Filer Category		Non-accelerated Filer
Entity Tax Identification Number		04-3308180
Entity Address, Address Line One		4B Gill Street
Entity Address, City or Town		Woburn
Entity Address, State or Province		MA
City Area Code		781
Stockholders' Equity, Reverse Stock Split	All share amounts in the Quarterly Report on Form 10-Q have been adjusted to reflect a 1-for-8 reverse stock split that was effected on November 21, 2023.
Common Stock [Member]
Document Information [Line Items]
Security Exchange Name		NASDAQ
Trading Symbol		NURO
Title of 12(b) Security		Common Stock, $0.0001 par value per share
Preferred Stock
Document Information [Line Items]
Title of 12(b) Security		Preferred Stock Purchase Rights

Business and Basis of Presentation (Detail) - USD ($)	3 Months Ended		12 Months Ended
Business and Basis of Presentation (Detail) - USD ($)	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Organization And Basis Of Presentation [Line Items]
Accounts receivable, net	$ 469,650		$ 518,824
Net proceeds from issuance of stock and warrants	1,471,099	$ 0
Accumulated deficit	213,138,927		210,109,353
Cash and cash equivalents	1,259,930		1,731,946
Prepaid expenses and other current assets	(611,735)		(779,039)
Assets, Current	(20,151,933)		(20,854,442)
Liabilities, Current	(1,847,170)		(1,240,639)
Operating Lease, Liability, Noncurrent	(60,946)		(92,485)
Stockholders' Equity Attributable to Parent	18,756,012	22,012,748	20,091,317	$ 23,355,687
Cost of revenues	576,539	526,372
Gross Profit	517,017	1,198,399
Operating Lease, Right-of-Use Asset	(217,254)		(250,150)
Assets	(20,664,128)		(21,424,441)
Accrued Liabilities, Current	(1,554,226)		(876,739)
Liabilities	(1,908,116)		(1,333,124)
Allowance for doubtful accounts	25,000		$ 25,000
Cash, Cash Equivalents, and Short-Term Investments	17,600,000
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent		65,874
Net Income (Loss) Attributable to Parent	$ 3,029,574	$ 1,574,174
Three Customers [Member] \| Accounts Receivable \| Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage	64.00%		74.00%
Two Customers \| Revenue \| Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage	25.00%	39.00%

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Inventories (Tables)

3 Months Ended

Mar. 31, 2024

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories consist of the following:


	March 31, 2024		December 31, 2023
Purchased components	$	1,093,201	$	1,151,381

Finished goods	378,237		408,047
	$	1,471,438	$	1,559,428

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Assets
Assets, Fair Value Disclosure	$ 17,594,916	$ 17,549,495
Liabilities [Abstract]
Debt Securities, Available-for-Sale	16,339,180	16,265,205	$ 16,265,205
US Government Agencies Debt Securities
Liabilities [Abstract]
Debt Securities, Available-for-Sale	7,894,035		4,418,600
Money Market Funds
Liabilities [Abstract]
Cash and Cash Equivalents, Fair Value Disclosure	1,255,736	1,284,290
US Government Agencies Debt Securities
Liabilities [Abstract]
Debt Securities, Available-for-Sale	7,894,035	4,418,600
Commercial Paper
Liabilities [Abstract]
Debt Securities, Available-for-Sale	8,445,145	11,846,605	$ 11,846,605
Level 1
Assets
Assets, Fair Value Disclosure	9,149,771	5,702,890
Level 1 \| Money Market Funds
Liabilities [Abstract]
Cash and Cash Equivalents, Fair Value Disclosure	1,255,736	1,284,290
Level 1 \| US Government Agencies Debt Securities
Liabilities [Abstract]
Debt Securities, Available-for-Sale	7,894,035	4,418,600
Level 2
Assets
Assets, Fair Value Disclosure	8,445,145	11,846,605
Level 2 \| Commercial Paper
Liabilities [Abstract]
Debt Securities, Available-for-Sale	8,445,145	11,846,605
Level 3
Assets
Assets, Fair Value Disclosure	$ 0	$ 0

Restructuring and Related Activities (Tables)

3 Months Ended

Mar. 31, 2024

Restructuring and Related Activities [Abstract]

Restructuring and Related Costs [Table Text Block]

The following table sets forth the activity during the quarter in accrued severance.


	Quarter ended March 31, 2024
Severance
Beginning balance	$	—
Additions	580,427
Amounts paid out	(25,427)
Ending balance	$	555,000

Pay vs Performance Disclosure - USD ($)	3 Months Ended
Pay vs Performance Disclosure - USD ($)	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ (3,029,574)	$ (1,574,174)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Leases Leases (Details) - USD ($)		3 Months Ended
Leases Leases (Details) - USD ($)	Jun. 01, 2018	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Operating Leased Assets [Line Items]
Operating Lease, Weighted Average Discount Rate, Percent		15.00%
Operating Lease, Weighted Average Remaining Lease Term		1 year 6 months
Operating Lease, Expense		$ 50,377	$ 49,232
Lessee, Operating Lease, Liability, to be Paid, Year One		117,431
Lessee, Operating Lease, Liability, to be Paid, Year Two		124,339
Lessee, Operating Lease, Liability, to be Paid		241,770
Operating Lease Discount		32,433
Operating Lease, Liability, Current		148,391		$ 148,391
Operating Lease, Liability, Noncurrent		$ 60,946		$ 92,485
Woburn Lease [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Renewal Term	5 years
Woburn Lease [Member] \| MonthlyRent [Member]
Operating Leased Assets [Line Items]
Operating Lease, Payments	$ 13,846

Statements of Operations (Unaudited) - USD ($)	3 Months Ended
Statements of Operations (Unaudited) - USD ($)	Mar. 31, 2024	Mar. 31, 2023
Revenue from Contract with Customer, Including Assessed Tax	$ 1,093,556	$ 1,724,771
Other Nonoperating Income	205,255	0
Net loss	$ (3,029,574)	$ (1,574,174)
Earnings Per Share, Diluted	$ (1.67)	$ (1.64)
Earnings Per Share, Basic	$ (1.67)	$ (1.64)
Weighted Average Number of Shares Outstanding, Diluted	1,812,455	961,153
Weighted Average Number of Shares Outstanding, Basic	1,812,455	961,153
Loss from operations	$ (3,253,991)	$ (1,710,069)
Investment Income, Interest	19,162	135,895
Operating expenses:
Research and development	943,552	699,425
Sales and marketing	1,061,729	815,872
General and administrative	1,765,727	1,393,171
Total operating expenses	3,771,008	2,908,468
Gross profit	517,017	1,198,399
Cost of revenues	576,539	526,372
Nonoperating Income (Expense), Total	$ 224,417	$ 135,895

Business and Basis of Presentation	3 Months Ended
Business and Basis of Presentation	Mar. 31, 2024
Accounting Policies [Abstract]
Business Description and Accounting Policies	Business and Basis of Presentation NeuroMetrix, Inc. (the "Company" or "NeuroMetrix") develops and commercializes health care products that utilize non-invasive neurostimulation. Revenues are derived from the sale of medical devices and after-market consumable products and accessories. The Company’s products are sold in the United States and select overseas markets. They are cleared by the U.S. Food and Drug Administration ("FDA") and regulators in foreign jurisdictions where appropriate. The Company has two primary products. DPNCheck® is a point-of-care test for diabetic peripheral neuropathy, which is the most common long-term complication of Type 2 diabetes. Quell is an app-enabled, wearable device for lower extremity chronic pain and for the symptoms of fibromyalgia. The Company held cash, cash equivalents and investment grade securities totaling $17.6 million on March 31, 2024. The Company believes that its present balance of cash resources and securities coupled with cash inflows from product sales will enable the Company to fund its operations for at least the next twelve months from the date of issuance of the financial statements. Actual cash requirements could differ from management's projections for many reasons, including changes the Company may make to its business strategy, commercial challenges, regulatory developments, changes to research and development programs, supply chain issues, staffing challenges and other items affecting the Company's projected uses of cash. During February 2024, the Company announced that it would undertake a review of its strategic options to maximize shareholder value. These options include changes in marketing strategies, the acquisition of new assets, potential sale of Company assets, and a merger or other strategic transaction. A timetable for completion of this evaluation process has not been established, and even if certain strategic alternatives may be available, the Company cannot provide any assurance that the strategic alternatives review process will result in the successful realization of any particular alternative, transaction or value. Accordingly, the unaudited financial statements have been prepared on a basis that assumes the Company will continue as a going concern and which contemplates the realization of assets and satisfaction of liabilities and commitments in the ordinary course of business. Unaudited Interim Financial Statements The accompanying unaudited balance sheet as of March 31, 2024, unaudited statements of operations, statements of comprehensive loss, changes in stockholders' equity and cash flows for the quarters ended March 31, 2024 and 2023 have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. The accompanying balance sheet as of December 31, 2023 has been derived from the audited balance sheet as of December 31, 2023 included in the Company's Form 10-K referenced below and does not include all disclosures required by U.S. GAAP. In the opinion of management, the financial statements include all normal and recurring adjustments considered necessary for a fair presentation of the Company’s financial position and operating results. Operating results for the three months ended March 31, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024 or any other period. These financial statements and notes should be read in conjunction with the financial statements for the year ended December 31, 2023 included in the Company’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission (the "SEC"), on March 1, 2024 (File No. 001-33351). Revenues Revenues include product sales, net of estimated returns. Revenue is measured as the amount of consideration the Company expects to receive in exchange for product transferred. Revenue is recognized at the point in time when contractual performance obligations have been satisfied and control of the product has been transferred to the customer. The Company has a single product delivery performance obligation. Accrued product returns using the most likely amount method are estimated based on historical data and evaluation of current information and variable consideration is not constrained. Revenue from product sales that occur via an online pharmacy agent are recognized on a gross basis and the related fulfillment fees are expensed within cost of revenues. Accounts receivable are recorded in the amount the Company expects to collect, net of the allowance for credit losses. The allowance for credit losses is the Company’s best estimate of the amount of probable credit losses based on customer past payment history, product usage activity, and recent communications with the customer. Individual customer balances which are over 90 days past due are reviewed individually for collectability and written-off when recovery is not probable. The Company does not have any off-balance sheet credit exposure related to its customers. Allowance for credit losses was $25,000 as of March 31, 2024 and December 31, 2023. Two customers accounted for 25% and 39% of total revenues in the quarters ended March 31, 2024 and 2023, respectively. Three customers accounted for 64% and 74% of accounts receivable as of March 31, 2024 and December 31, 2023, respectively. Cash and Cash Equivalents Cash and cash equivalents include bank demand deposits and money market funds that invest primarily in U.S. government securities. Securities The Company invests in highly liquid, marketable debt securities with high credit ratings and typically with maturities of two years or less. Individual securities are designated by the Company as either "held-to-maturity" ("HTM") or “available-for-sale” ("AFS") at the point of investment. Securities classified as short-term have maturities of less than one year. As of March 31, 2024, all marketable securities held by the Company are classified as available for sale and had remaining contractual maturities of one year or less. HTM securities are valued on an amortized cost basis and reviewed to determine if an allowance for credit losses should be recorded in the statements of operations. AFS securities are valued at fair value. Unrealized gains and losses on AFS securities are included as a component of accumulated other comprehensive income in the balance sheets and statements of stockholders’ equity and a component of total comprehensive loss in the statements of comprehensive loss. An AFS security is impaired if its fair value is less than amortized cost. Unrealized losses are evaluated to determine if the impairment is credit-related or non credit-related. Credit-related impairment is recognized as an allowance on the balance sheet with a corresponding adjustment to earnings, and a non credit-related impairment is recognized in other comprehensive loss. For certain types of securities, such as U.S. Treasuries, the Company generally expects zero credit losses. No allowance for credit losses was recorded on its securities portfolio as of March 31, 2024 or December 31, 2023. Fair Value The Company follows the provisions of Financial Accounting Standards Board (the "FASB") Accounting Standards Codification ("ASC") Topic 820-10, Fair Value Measurements and Disclosures ("ASC 820-10"), which defines fair value, establishes a framework for measuring fair value in GAAP and requires certain disclosures about fair value measurements. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, ASC 820-10 established a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows: Level 1 observable inputs such as quoted prices in active markets; Level 2 inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3 unobservable inputs for which there are little or no market data, which require the Company to develop its own assumptions. The hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value (See Note 5). Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make significant estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during reporting periods. Actual results could differ from those estimates. Recent Accounting Pronouncements Accounting Standards Updates ("ASUs") issued by the FASB are evaluated for their applicability. ASUs not included in the disclosures in this report were assessed and determined to be either not applicable or not expected to have a material impact on our financial statements. Recently adopted accounting pronouncement In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures, which requires public entities, on an annual basis, to provide disclosures of specific categories in the rate reconciliation, additional information for reconciling items that meet a quantitative threshold and income taxes paid disaggregated by jurisdiction. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. Early adoption is permitted. The Company is currently evaluating the impact of the adoption of this standard on the Company’s Financial Statements and disclosures.

Restructuring and Related Activities

3 Months Ended

Mar. 31, 2024

Restructuring and Related Activities [Abstract]

Restructuring and Related Activities Disclosure [Text Block]

10. Employee Reduction

As indicated in Note 1., the Company has initiated a review of its strategic options to maximize shareholder value. These options include changes in marketing strategies, the acquisition of new assets, potential sale of Company assets, and a merger or other strategic transaction.

The Company incurred severance charges related to a reduction of 10 full time employees in the first quarter of 2024. The reduction was implemented in order to better align staffing with work responsibilities and to reduce operating expenses. Cash payments of approximately $207,000 for a majority of the employees will be made by the end of May 2024 and approximately $348,000 in cash payments related to two employees who have extended agreements will be ratably paid through December 2024.

The following table sets forth the activity during the quarter in accrued severance.


	Quarter ended March 31, 2024
Severance
Beginning balance	$	—
Additions	580,427
Amounts paid out	(25,427)
Ending balance	$	555,000

Within the Company's Statements of Operations for the quarter ended March 31, 2024, $580,427 in severance charges were recorded as follows: $310,200 within research and development, $234,527 within sales and marketing, $4,200 within general and administrative and $31,500 within cost of revenues.

Preferred Stock and Convertible Preferred Stock (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Preferred Non-Convertible Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Value of preferred stock issued	$ 0	$ 0
Preferred stock, shares outstanding (in shares)	0	0
Series B Preferred Stock \| Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	147,000	147,000
Preferred stock, shares issued (in shares)	200	200
Value of preferred stock issued	$ 1	$ 1
Preferred stock, shares outstanding (in shares)	200	200

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details