Note 6 - Assets Held for Rent (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Assets Held for Rent, Depreciation	$ 921,000	$ 410,000	$ 2,700,000	$ 873,000