Note 1 - Organization and Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Allowance for doubtful accounts	$ 106	$ 111
Provision charged to expense	0	0
Write-offs / Recoveries	2	(5)
Allowance for doubtful accounts	$ 108	$ 106