Note 1 - Summary of Significant Accounting Policies - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Balance	$ 422	$ 501	$ 501
Additions			71
Amortization	40	36	150
Balance	382		422
Customer Relationships [Member]
Balance	216	360	360
Additions			0
Amortization	36		144
Balance	180		216
Patents [Member]
Balance	206	$ 141	141
Additions			71
Amortization	4		6
Balance	$ 202		$ 206