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Note 5 - Other Long-Term Obligations and Commitments (Details Textual) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Operating Lease, Weighted Average Discount Rate, Percent 9.50%  
Operating Lease, Cost $ 386 $ 370
Operating Lease, Payments $ 408 $ 391
Operating Lease, Weighted Average Remaining Lease Term 8 months 19 days 5 months 5 days
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year $ 412  
Lessee, Operating Lease, Liability, to be Paid, Year One 291  
Lessee, Operating Lease, Liability, to be Paid, Year Two 127  
Lessee, Operating Lease, Liability, to be Paid, Year Three 27  
Operating Lease, Expense $ 438 $ 441