Note 6 - Assets Held for Rent (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Assets Held for Rent, Depreciation	$ 868,000	$ 299,000	$ 1,800,000	$ 483,000