Note 13 - Stock Warrants (Details Textual) |
Mar. 31, 2021
$ / shares
shares
|
|---|---|
| Class of Warrant or Right, Outstanding (in shares) | shares | 972,324 |
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 17.97 |
| Minimum [Member] | |
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.20 |
| Warrants and Rights Outstanding, Term (Year) | 1 year |
| Maximum [Member] | |
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 49.80 |
| Warrants and Rights Outstanding, Term (Year) | 14 years 146 days |
| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of warrants or rights outstanding. No definition available.
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| X | ||||||||||
- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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