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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Description of method used to estimate fair value of award under share-based payment arrangement.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Purchase price of common stock expressed as a percentage of its fair value.

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Equity Incentive Plans - Additional Information (Details) - USD ($)	1 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Jan. 01, 2024	Jan. 01, 2023	Dec. 31, 2021
Equity Incentive Plans
Option term			10 years
Shares available to award	7,190	4,564	7,190	4,564			7,073
Percentage of number of shares added each year	5.00%	5.00%		5.00%
Weighted-average grant date fair value per share of stock options granted			$ 0.12	$ 1.01
Vesting Period			4 years
Vesting percentage			25.00%
Stock-based compensation			$ 271,000	$ 398,000
Total unrecognized compensation costs	$ 440,000		$ 440,000
Weighted-average amortization period			2 years 14 days
Company estimated the fair value of share-based payment awards			Black-Scholes options valuation model
Income tax benefits relating to stock-based compensation expenses			$ 0
Tax benefits from exercised stock options			$ 0
Share-Based Payment Arrangement, Employee [Member]
Equity Incentive Plans
Percentage of voting power			10.00%
Exercise price on percentage of fair market value per share on the date of grant			110.00%
Share-Based Payment Arrangement, Nonemployee [Member]
Equity Incentive Plans
Exercise price on percentage of fair market value per share on the date of grant			100.00%
Incentive Stock Option
Equity Incentive Plans
Option term			5 years
Restricted stock
Equity Incentive Plans
Stock awards outstanding	0		0
Fair value of restricted stock awards vested				$ 11,000
2021 Plan
Equity Incentive Plans
Number of shares authorized						4,839
Shares available to award	7,190		7,190
Percentage of voting power			10.00%
2021 Plan \| Subsequent Events [Member]
Equity Incentive Plans
Number of shares authorized					73,304