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Note 5 - Other Long-Term Obligations and Commitments (Details Textual) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Operating Lease, Weighted Average Discount Rate, Percent 9.50%  
Operating Lease, Cost $ 583 $ 557
Operating Lease, Payments $ 614 $ 592
Operating Lease, Weighted Average Remaining Lease Term 8 months 15 days 3 months
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year $ 206  
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 $ 670 $ 668