Note 3 - Accounts Receivable - Summary of the Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance, beginning of period	$ 89	$ 37
Provision for doubtful accounts	9	55
Write-offs	(11)	(3)
Balance, end of period	$ 87	$ 89