Note 2 - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 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