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Note 5 - Stockholders' Equity and Dilutive Equity Instruments (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 06, 2024 | May 02, 2024 | Jul. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Feb. 29, 2024 | Nov. 30, 2023
Proceeds from Warrant Exercises |  |  |  | $ 0 | $ 111,483 |  |  |
Share Repurchase Program [Member] |  |  |  |  |  |  |  |
Share Repurchase Program, Authorized, Amount | $ 80,600 |  |  |  |  |  | $ 48,600 | $ 35,000
Stock Repurchased and Retired During Period, Shares (in shares) |  |  |  | 520,082 |  | 590,499 |  |
Stock Repurchased and Retired During Period, Value |  |  |  | $ 46,600 |  | $ 35,000 |  |
Shares Acquired, Average Cost Per Share (in dollars per share) |  |  |  | $ 89,650,000 |  | $ 59.29 |  |
Share Repurchase Program, Excise Tax, Percent |  |  |  | 1.00% |  | 1.00% |  |
Share Repurchase Program, Increase in Authorized Amount | $ 13,900 | $ 18,100 |  |  |  |  |  |
Out-of-the-money Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding (in shares) |  |  |  | 782,993 |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  |  | 861,292 |  |  |  |
New Creditor Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |  |  |  | 1 |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  | $ 0.001 | $ 0.001 |  |  |
GLF Equity Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  |  | $ 100 |  |  |  |
Series A Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 57.06 |  |  |  |  |
Series B Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) |  |  | $ 62.28 |  |  |  |  |
Series A and B Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Outstanding (in shares) |  |  | 2,000,000 |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 1,900,000 |  |  |  |  |
Proceeds from Warrant Exercises |  |  | $ 111,500 |  |  |  |  |
Class of Warrant or Right, Expired (in shares) |  |  | 3,100,000 |  |  |  |  |

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