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Note 4 - Revenue Recognition - Assets and Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Total current assets $ 40,819 $ 37,209
Deferred revenues 2,954 3,599
Trade Receivables [Member]    
Trade receivables 15,088 15,969
Accrued Revenues [Member] | Licensing and Other [Member]    
Trade receivables 17,274 8,266
Accrued Revenues [Member] | Royalty [Member]    
Trade receivables 8,457 12,974
Other Noncurrent Assets [Member] | Licensing and Other [Member]    
Trade receivables 2,668 2,583
Deferred Revenue [Member]    
Deferred revenues $ 2,954 $ 3,599