Note 5 - Assets Held for Rent - Assets Held for Rent (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Shippers placed in service	$ 5,073	$ 3,171
Fixed assets held for rent	2,035	0
Accumulated depreciation	(943)	(411)
Net	6,165	2,760
Shippers and related components in production	2,327	1,945
Total	$ 8,492	$ 4,705