Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies - Credit Risk and Allowance for Doubtful Accounts (Details)

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Significant Accounting Policies - Credit Risk and Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Note 1 - Significant Accounting Policies - Credit Risk and Allowance for Doubtful Accounts (Details)      
Allowance for credit losses, beginning of period $ 9,123 $ 9,898 $ 9,692
Additional provisions for the year 2,192 417 206
Uncollectible accounts written off or collected (1,269) (1,192)  
Allowance for credit losses, end of period $ 10,046 $ 9,123 $ 9,898