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Note 7 - Operating Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Weighted-average remaining lease term (years) (Year) 4 years 4 months 24 days 4 years 8 months 12 days
Weighted-average discount rate 4.50% 4.50%
Other Noncurrent Assets [Member]    
Operating lease right-of-use asset $ 2,187 $ 2,187
Accrued Expenses and Other Current Liabilities [Member]    
Current operating lease liability 968 895
Other Noncurrent Liabilities [Member]    
Operating lease liability, net of current portion 1,199 1,307
Accrued Expenses and Other Current Liabilites and Other Noncurrent Liabilities [Member]    
Total operating lease liability $ 2,167 $ 2,202