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Note 5 - Revenue Recognition - Assets and Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Deferred revenues (short-term contract liabilities) $ 2,479 $ 3,018
Trade Receivables [Member]    
Trade receivables 14,052 8,433
Accrued Revenues [Member] | Licensing and Other [Member]    
Trade receivables 9,600 9,735
Accrued Revenues [Member] | Royalty [Member]    
Trade receivables 9,983 12,139
Deferred Revenue [Member]    
Deferred revenues (short-term contract liabilities) $ 2,479 $ 3,018