Note 5 - Bank Debt - Bank Debt, Less Debt Issuance Costs (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current bank debt	$ 26,000	$ 26,000
Less unamortized debt issuance cost	(1,562)	(1,562)
Net current portion	24,438	24,438
Long-term bank debt	51,000	65,500
Less unamortized debt issuance cost	(1,657)	(2,047)
Net long-term portion	49,343	63,453
Total bank debt	77,000	91,500
Less total unamortized debt issuance cost	(3,219)	(3,609)
Net bank debt	$ 73,781	$ 87,891