Note 10 - Shareholders' Equity (Details Textual) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 26, 2021 |
Mar. 31, 2021 |
Sep. 30, 2022 |
Sep. 30, 2021 |
|
| Stock Issued During Period, Shares, New Issues | 7,653,060 | |||
| Shares Issued, Price Per Share | $ 3.92 | |||
| Proceeds from Issuance of Common Stock | $ 30,000,000.0 | $ 0 | $ 29,867,000 | |
| Proceeds from Issuance of Common Stock, Net | $ 29,900,000 | |||
| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period | 40,000 | |||
| Stock Issued During Period, Value, Stock Options Exercised | $ 244,000 | $ 244,000 | ||
| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value | $ 132,000 | |||
| X | ||||||||||
- Definition The cash inflow from the issuance of common stock, net of offering costs. No definition available.
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| X | ||||||||||
- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Per share or per unit amount of equity securities issued. No definition available.
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| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Value of stock issued as a result of the exercise of stock options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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