Note 3 - Supplemental Balance Sheet Information - Activity In Allowance For Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Beginning balance in allowance for credit losses	$ 1,654	$ 564
Current provision for expected credit losses	261	1,269
Allowances associated with businesses sold	(281)	0
Write-offs charged against the allowance	(126)	(179)
Recoveries of amounts previously written off	(47)	0
Ending balance in allowance for credit losses	$ 1,461	$ 1,654