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Note 14 - Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of Shares |  |  | Weighted-Average Exercise Price |  |  | Weighted-Average of Remaining Contractual Life (in years) |  |  | Aggregate Intrinsic Value |
Outstanding at December 31, 2021 |  |  | 2,017,969 |  |  | $ | 6.74 |  |  |  |  |  |  |  |  |
Issued |  |  | — |  |  | $ | — |  |  |  |  |  |  |  |  |
Exercised |  |  | (1,211,141 | ) |  | $ | 3.08 |  |  |  |  |  |  |  |  |
Expired/Forfeited |  |  | (4,665 | ) |  | $ | 15.30 |  |  |  |  |  |  |  |  |
Outstanding at December 31, 2022 |  |  | 802,163 |  |  | $ | 12.23 |  |  |  | 1.6 |  |  | $ | 12,704,473 |
Exercisable at December 31, 2022 |  |  | 673,137 |  |  | $ | 8.71 |  |  |  | 1.2 |  |  | $ | 12,270,696 |
Schedule of Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block] |
|  | Year ended December 31, |
|  |  | 2022 |  |  |  | 2021 |
Weighted average fair value per share of options granted |  |  | N/A |  |  | $ | 24.00 |
Cash received from options exercised, net |  | $ | 3,731 |  |  | $ | 1,885 |
Aggregate intrinsic value of options exercised |  | $ | 74,296 |  |  | $ | 13,673 |
Grant date fair value of shares vested |  | $ | 1,802 |  |  | $ | 834 |

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