Note 1 - Summary of Significant Accounting Policies - Error Corrections and Prior Period Adjustments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Net Proceeds from Line of Credit		$ 0
Proceeds from Line of Credit	$ 119,349	109,544
Payments to Line of Credit	(121,468)	(103,856)
Principal Payments on Long-Term Debt	0	(1,128)
Principal Payments on Financing Leases	(599)	(664)
Stock Option Excercises	51	35
Net Cash Provided By Financing Activities	$ (2,667)	3,931
Previously Reported [Member]
Net Proceeds from Line of Credit		5,688
Proceeds from Line of Credit		0
Payments to Line of Credit		0
Principal Payments on Long-Term Debt		(1,128)
Principal Payments on Financing Leases		(664)
Stock Option Excercises		35
Net Cash Provided By Financing Activities		3,931
Revision of Prior Period, Adjustment [Member]
Net Proceeds from Line of Credit		(5,688)
Proceeds from Line of Credit		109,544
Payments to Line of Credit		(103,856)
Net Cash Provided By Financing Activities		$ 0