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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