Note 9 - Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
Sep. 30, 2022 |
Dec. 31, 2022 |
Dec. 31, 2023 |
|
| Class Of Warrant Or Right, Issued During Period (in shares) | 194,000 | ||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 0.01 | ||||
| Class of Warrant or Right, Exercised During Period (in shares) | 194,000 | ||||
| Class of Warrant or Right, Granted During the Period, Fair Value Per Share (in dollars per share) | $ 50.32 | ||||
| Amortization of Warrants | $ 1,216 | $ 1,438 | |||
| Current Prepaid Expenses [Member] | |||||
| Warrants and Rights Outstanding | 811 | $ 2,027 | |||
| Other Assets [Member] | |||||
| Warrants and Rights Outstanding | $ 0 | $ 0 | |||