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Note 8 - OMIDRIA Royalty Obligation (Details Textual) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2022 | Feb. 29, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2023
Proceeds From Royalty Obligation |  |  | $ 0 | $ 125,000 | $ 0 |
Interest Expense |  |  | 30,844 | 22,702 | $ 19,669 |
Subsequent Event [Member] |  |  |  |  |  |
Proceeds From Royalty Obligation |  | $ 115,500 |  |  |  |
Subsequent Event [Member] | Minimum [Member] |  |  |  |  |  |
Milestone Benchmark One, If Milestone Achieves |  | 10,000 |  |  |  |
Milestone Benchmark Two, If Milestone Achieves |  | 156,000 |  |  |  |
Milestone Benchmark Three, Minimum Net Sales Required for Four Consecutive Quarters |  | 8,000 |  |  |  |
Milestone Benchmark Four, Minimum Net Sales Required for Four Consecutive Quarters |  | 181,000 |  |  |  |
Subsequent Event [Member] | Maximum [Member] |  |  |  |  |  |
Milestone Benchmark One, If Milestone Achieves |  | 27,500 |  |  |  |
Milestone Benchmark Two, If Milestone Achieves |  | 160,000 |  |  |  |
Milestone Benchmark Three, Minimum Net Sales Required for Four Consecutive Quarters |  | 27,500 |  |  |  |
Milestone Benchmark Four, Minimum Net Sales Required for Four Consecutive Quarters |  | $ 185,000 |  |  |  |
Royalty Obligation [Member] |  |  |  |  |  |
Interest Expense |  |  | 11,800 | $ 2,900 |  |
Royalty Obligation [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Liabilities, Fair Value Disclosure |  |  | $ 116,300 |  |  |
DRI Healthcare Acquisition LP [Member] |  |  |  |  |  |
Proceeds From Royalty Obligation | $ 125,000 |  |  |  |  |
Maximum Royalty Payable Percentage |  |  | 9.40% |  |  | 9.40%

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