Note 2 - Allowance for Doubtful Accounts Receivable - Allowance for Doubtful Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance at the beginning of year	$ 6,393	$ 7,667
Provision for bad debts - accounts receivable	2,891	2,260
Charge-offs	(1,686)	(3,653)
Recoveries	24	119
Balance at the end of year	$ 7,622	$ 6,393