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Note 12 - Subsequent Events (Details Textual) - USD ($) $ in Thousands | Oct. 28, 2022 | Oct. 21, 2022 | Nov. 09, 2022 | Sep. 30, 2022 | Dec. 31, 2021
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Debt Instrument, Face Amount |  |  |  | $ 483,461 | $ 353,000
Forecast [Member] |  |  |  |  |
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized |  |  | $ 160,000 |  |
Transfer of Financial Assets Accounted for as Sales, Cash Proceeds Received for Assets Derecognized, Amount |  |  | 98,800 |  |
Forecast [Member] | Notes Payable, Other Payables [Member] |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 100,000 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 7.56% |  |
Subsequent Event [Member] | Emalex Biosciences, Inc. [Member] | Equity Securities [Member] |  |  |  |  |
Payments to Acquire Investments, Total |  | $ 400 |  |  |
Subsequent Event [Member] | Robin Healthcare, Inc. [Member] | Debt Investments [Member] |  |  |  |  |
Payments to Acquire Investments, Total |  | $ 7,000 |  |  |
Subsequent Event [Member] | Sonex Health, Inc. [Member] | Debt Investments [Member] |  |  |  |  |
Payments to Acquire Investments, Total | $ 2,500 |  |  |  |

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