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Note 4 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Total accrued liabilities $ 36,700 $ 37,262
Accrued Liabilities [Member]    
Salary and payroll tax accrual 13,956 13,255
Taxes payable 3,152 2,903
Current portion of operating lease liability 2,460 2,287
License fee obligation 713 1,000
Placement fees payable 6,314 6,314
Accrued other $ 10,105 $ 11,503