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Note 11 - Shareholders' Equity (Deficit) (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 23, 2023 | Dec. 31, 2023 | Nov. 09, 2023 | Mar. 01, 2021
Equity Offering Facility, Maximum Aggregate Offering Amount |  | $ 150,000 |  | $ 150,000
Stock Repurchase Program, Authorized Amount |  |  | $ 50,000 |
Stock Repurchased and Retired During Period, Value |  | $ 4,654 |  |
Indefinite Term Share Repurchase Program [Member] |  |  |  |
Stock Repurchased and Retired During Period, Shares (in shares) |  | 1,800,000 |  |
Shares Acquired, Average Cost Per Share (in dollars per share) |  | $ 2.54 |  |
Stock Repurchased and Retired During Period, Value |  | $ 4,700 |  |
2017 Omnibus Incentive Compensation Plan [Member] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) | 5,000,000 |  |  |

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