Class of warrant or right reduction.

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Reduction in value of warrants.

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No definition available.

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

The amount of plan compensation cost recognized during the period.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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No definition available.

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The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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No definition available.

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- 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.

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No definition available.

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- Definition

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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- Definition

Gross number of share options (or share units) granted during the period.

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No definition available.

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Number of options outstanding, including both vested and non-vested options.

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Expected term of 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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Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of new stock issued during the period.

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Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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Stock-Based Compensation - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended
	Mar. 31, 2020	Oct. 30, 2021	Oct. 30, 2021	Oct. 31, 2020	Jan. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding under equity incentive plans		855,000	855,000		855,000
Stock issued during period, values				$ 216,000
Reduction in value of warrants				89,000
Compensation expense				127,000
Number of shares granted			0
Number of shares granted, value		$ 2,000,000
Stock-based compensation expense			$ 76,000	$ 673,000
Stock options granted under equity incentive plans				180,000,000
Expected life				5 years
Fair value assumption, risk-free interest rates, minimum				0.20%
Fair value assumption, risk-free interest rates, maximum				0.30%
Expected dividend yield				0.00%
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	1,068,000	575,000
Fair value assumption, expected volatility				95.00%
Immediate Vesting Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life				2 years 6 months
Graded Vested Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life				3 years 3 months 14 days
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted				295,000
Number of shares granted, value				$ 390,000
Unregistered Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares				300,000
Reduction of warrants				300,000
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			$ 76,000	$ 77,000
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense				$ 79,000
2015 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding under equity incentive plans		855,000	855,000
Common stock available for future issuance		1,067,000	1,067,000