Note 1 - Summary of Significant Accounting Policies - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022	Dec. 31, 2022
Balance			$ 422	[1]	$ 501	$ 501
Additions						71
Amortization	$ 40	$ 35	80		71	150
Balance	342		342			422	[1]
Customer Relationships [Member]
Balance			216		360	360
Additions						0
Amortization			72			144
Balance	144		144			216
Patents [Member]
Balance			206		$ 141	141
Additions						71
Amortization			8			6
Balance	$ 198		$ 198			$ 206

[1] The balance sheet at December 31, 2022 has been derived from the audited financial statements at that date