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Note 18 - Stock Option Plans (Tables) | 12 Months Ended
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Jan. 31, 2022
Notes Tables |
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] |
|  | Year Ended January 31, |
|  | 2022 |  |  | 2021 |
Risk free interest rate |  |  | 0.72% - 0.72% |  |  |  | 0.34% - 0.37% |
Expected life (in years) |  |  | 3.97 - 5.97 |  |  |  | 3.97 - 5.97 |
Expected volatility |  |  | 63% - 63% |  |  |  | 53% - 64% |
Expected dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted |  |  |  |  |
|  |  |  |  |  |  |  |  |  | Average |  |  |  |  |
|  |  |  |  |  | Weighted |  |  | Remaining |  |  | Aggregate |
|  | Number of |  |  | Average |  |  | Contractual |  |  | Intrinsic |
|  | Shares |  |  | Exercise |  |  | Term |  |  | Value |
|  | (in thousands) |  |  | Price |  |  | (in years) |  |  | (in thousands) |
Outstanding, January 31, 2021 |  |  | 2,586 |  |  | $ | 4.09 |  |  |  | 6.58 |  |  | $ | 222 |
Granted |  |  | 875 |  |  |  | 1.97 |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Forfeited |  |  | (10 | ) |  |  | 3.79 |  |  |  |  |  |  |  |  |
Expired |  |  | (26 | ) |  |  | 6.28 |  |  |  |  |  |  |  |  |
Outstanding, January 31, 2022 |  |  | 3,425 |  |  | $ | 3.53 |  |  |  | 6.58 |  |  | $ | 100 |
Exercisable at January 31, 2022 |  |  | 2,158 |  |  | $ | 4.34 |  |  |  | 5.19 |  |  | $ | — |
Vested and expected to vest at January 31, 2022 |  |  | 3,361 |  |  | $ | 3.60 |  |  |  | 6.54 |  |  | $ | 99 |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  | Year Ended January 31, 2022 |
|  | Number of |  |  | Weighted Average |
|  | Shares |  |  | Grant Date Fair |
|  | (in thousands) |  |  | Value |
Unvested, beginning of period |  |  | 40 |  |  | $ | 2.94 |
Granted |  |  | — |  |  |  | — |
Vested |  |  | (18 | ) |  |  | 3.19 |
Canceled |  |  | — |  |  |  | — |
Unvested, end of period |  |  | 22 |  |  | $ | 2.76 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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