Note 6 - Assets Held for Rent - Assets Held for Rent (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Shippers placed in service	$ 6,274	$ 5,645
Fixed assets held for rent	4,686	4,040
Accumulated depreciation	(3,737)	(2,272)
Net	7,223	7,413
Shippers and related components in production	1,860	2,396
Total	$ 9,083	$ 9,809