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Note 12 - Stock-based Compensation - Nonvested Option Awards Activity (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Options granted, shares (in shares) | 1,982,500 | 235,000
Share-based Payment Arrangement, Option [Member] |  |
Nonvested, shares (in shares) | 235,000 | 23,500
Nonvested, weighted average grant date fair value (in dollars per share) | $ 0.36 | $ 0.17
Options granted, shares (in shares) | 1,982,500 | 235,000
Granted, weighted average grant date fair value (in dollars per share) | $ 1.55 | $ 0.36
Vested, shares (in shares) | (1,265,000) | (23,500)
Vested, weighted average grant date fair value (in dollars per share) | $ 1.35 | $ 0.17
Forfeited, shares (in shares) | 0 | 0
Forfeited, weighted average grant date fair value (in dollars per share) | $ 0 | $ 0
Nonvested, shares (in shares) | 952,500 | 235,000
Nonvested, weighted average grant date fair value (in dollars per share) | $ 1.51 | $ 0.36

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Details
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