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Note 13 - Related Party Transactions (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Accounts Payable, Current $ 909 $ 885  
Operating Lease, Liability 4,367 4,300  
Operating Lease, Right-of-Use Asset $ 4,200 $ 4,300  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other Assets, Noncurrent Other Assets, Noncurrent  
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Other Liabilities, Noncurrent Other Liabilities, Noncurrent  
Other Assets, Noncurrent $ 11,628 $ 7,540  
Affiliated Entity [Member]      
Accounts Payable, Current 600 600  
WPPLP [Member]      
Other Assets, Current 200 100  
Operating Lease, Liability 3,400 3,500  
Operating Lease, Right-of-Use Asset 3,400 3,500  
Operating Costs and Expenses 100 5,100 $ 8,500
WPPLP [Member] | Prepaid Royalty [Member]      
Other Assets, Noncurrent $ 500 $ 0