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Note 3 - Acquisitions of Ownership Interests (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Payments to Acquire Equity Method Investments       $ 3,000 $ (0)  
Equity Method Investments $ 10,680     $ 10,680   $ 8,846
Prognos Health, Inc. [Member]            
Payments to Acquire Equity Method Investments   $ 3,000        
Equity Method Investments   $ 14,600        
Trice Medical, Inc. [Member]            
Equity Method Investments     $ 12,000      
Convertible Bridge Loan     $ 300      
InfoBionic, Inc. [Member]            
Other Method Investment, Realized Gain (Loss) $ 1,700          
InfoBionic, Inc. [Member] | Approximate [Member]            
Other Method Investment, Ownership Percentage 5.00%     5.00%