v3.21.2

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 |  |

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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 + Details
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