Note 1 - Organization and Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Allowance for doubtful accounts	$ 111	$ 110
Provision charged to expense	0	24
Write-offs / Recoveries	(5)	(23)
Allowance for doubtful accounts	$ 106	$ 111