Note 2 - Revenue Recognition - Timing of Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 26,941	$ 24,261
Transferred at Point in Time [Member]
Revenues	18,849	20,072
Transferred over Time [Member]
Revenues	$ 8,092	$ 4,189