Note 6 - Assets Held for Rent - Assets Held for Rent (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Shippers placed in service	$ 7,375	$ 5,645
Fixed assets held for rent	4,686	4,040
Accumulated depreciation	(4,571)	(2,272)
Net	7,490	7,413
Shippers and related components in production	1,867	2,396
Total	$ 9,357	$ 9,809