Note 10 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Segment loss	$ (2,002)	$ (1,528)
Sales, general and administrative expenses	(4,185)	(5,002)
Severance and transition costs	(7)	(145)
Gain (loss) from disposal of equipment	124	(47)
Impairment loss	(128)	(733)
Depreciation and amortization	(5,215)	(5,282)
Loss from operations	$ (11,413)	$ (12,737)