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Note 15 - Employee Stock Purchase Plan (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Jun. 23, 2021
Stock Issued During Period, Value, Employee Stock Purchase Plan | $ 205 | $ 233 |  |  |  |  |  |  |
Share Price (in dollars per share) | $ 13.6 | $ 10.3 | $ 15.17 | $ 26.26 | $ 20.74 | $ 7.63 | $ 6.82 | $ 10.73 |
Share-based Compensation Arrangement by Share-based Payment Award, Discount Amount | $ 31 | $ 36 |  |  |  |  |  |  |
Employee Stock Purchase Plan [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  |  |  |  |  |  |  |  | 250,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares) | 11,780 | 27,162 |  |  |  |  |  |  |
Stock Issued During Period, Value, Employee Stock Purchase Plan | $ 174 | $ 197 |  |  |  |  |  |  |
Shares Issued, Price Per Share (in dollars per share) | $ 11.56 | $ 8.76 | $ 12.89 | $ 22.32 | $ 17.63 | $ 6.49 | $ 5.8 | $ 9.12 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Purchase Date | 15.00% | 15.00% |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Discount Amount | $ 31 | $ 36 |  |  |  |  |  |  |

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- Definition Discount rate from fair value on purchase date that participants pay for shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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