Note 10 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment loss	$ (380)	$ (651)	$ 442	$ (1,225)
Sales, general, and administrative expenses	(1,094)	(907)	(3,763)	(2,897)
Severance and transition costs	(2)	0	(301)	(7)
Loss on disposal of equipment	(93)	(0)	(258)	(70)
Depreciation and amortization	(1,069)	(1,302)	(3,317)	(3,975)
Loss from operations	(2,638)	(2,860)	(7,197)	(8,174)
Operating Income (Loss), Total	$ (2,638)	$ (2,860)	$ (7,197)	$ (8,174)