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Note 1 - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Beginning balance, January 1, $ 2,595 $ 3,338 $ 4,106
Additions 984 1,557 171
Deductions (851) (2,300) (939)
Ending balance, December 31, $ 2,728 $ 2,595 $ 3,338