Note 6 - Other Assets - Other Assets (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Investment in marketable securities	$ 984,201	$ 1,514,483
Total other assets	3,876,429	4,658,504
Other Assets [Member]
Deferred rent receivable	1,435,377	1,660,197
Prepaid expenses, deposits and other	775,972	473,554
Investment in marketable securities	984,201	1,514,483
Accounts receivable, net	134,756	401,927
Right-of-use assets, net	60,411	74,643
Other intangibles, net	52,483	82,483
Notes receivable	316,374	316,374
Deferred offering costs	116,855	134,843
Total other assets	$ 3,876,429	$ 4,658,504