Note 2 - Revenue and Product Costs - Contract Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Balance	$ 673
Current portion	622	$ 407
Long-term portion	51	$ 137
Customer Deposits [Member]
Balance	1,002
Additions, net	65
Contract with Customer Liability Revenue Recognized Including Opening Balance	(1,022)
Balance	45
Current portion	45
Long-term portion	0
Deferred Revenue [Member]
Balance	544
Additions, net	724
Contract with Customer Liability Revenue Recognized Including Opening Balance	(595)
Balance	673
Current portion	622
Long-term portion	$ 51