Note 1 - Description of Business and Summary of Significant Accounting Policies - Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Allowance for credit losses		$ 890	$ 890	$ 890
Charged to expense	[1]	168	0	20
Deductions and Write-offs of accounts receivable		(168)	0	(20)
Allowance for credit losses		$ 890	$ 890	$ 890

[1] Additions to the accounts receivable reserve for credit losses are charged to bad debt expense.