Note 12 - Share-based Compensation - Stock Option Activity (Details) - USD ($) |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
Dec. 31, 2020 |
|
| Exercised (in shares) | (40,000) | (7,200) | |
| Exercised, aggregate intrinsic value | $ 132,000 | ||
| Share-based Payment Arrangement, Option [Member] | |||
| Balance (in shares) | 1,389,568 | ||
| Balance, weighted average exercise price (in dollars per share) | $ 5.38 | ||
| Balance, aggregate intrinsic value | $ 0 | $ 7,109,000 | |
| Granted (in shares) | 85,000 | ||
| Granted, weighted average exercise price (in dollars per share) | $ 9.69 | ||
| Exercised (in shares) | (40,000) | ||
| Exercised, weighted average exercise price (in dollars per share) | $ 6.11 | ||
| Exercised, aggregate intrinsic value | $ 132,000 | ||
| Expired/cancelled (in shares) | (13,476) | ||
| Expired / cancelled, weighted average exercise price (in dollars per share) | $ 6.54 | ||
| Balance (in shares) | 1,421,092 | ||
| Balance, weighted average exercise price (in dollars per share) | $ 5.63 | ||
| 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://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
|
| X | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. No definition available.
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| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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