Note 1 - Summary of Significant Accounting Policies - Error Corrections and Prior Period Adjustments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Net Proceeds from Line of Credit		$ 0
Proceeds from Line of Credit	$ 95,783	88,673
Payments to Line of Credit	(98,035)	(87,816)
Principal Payments on Long-Term Debt		0
Principal Payments on Financing Leases	(291)	(326)
Stock Option Excercises	155	51
Net Cash Provided by Financing Activities	$ (2,388)	582
Previously Reported [Member]
Net Proceeds from Line of Credit		857
Proceeds from Line of Credit		0
Payments to Line of Credit		0
Principal Payments on Long-Term Debt		0
Principal Payments on Financing Leases		(326)
Stock Option Excercises		51
Net Cash Provided by Financing Activities		582
Revision of Prior Period, Adjustment [Member]
Net Proceeds from Line of Credit		(857)
Proceeds from Line of Credit		88,673
Payments to Line of Credit		(87,816)
Principal Payments on Long-Term Debt		0
Principal Payments on Financing Leases		0
Stock Option Excercises		$ 0