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Note 6 - Other Assets - Other Assets (Details) - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Investment in marketable securities $ 975,176 $ 1,514,483
Total other assets 3,992,267 4,658,504
Other Assets [Member]    
Deferred rent receivable 1,408,733 1,660,197
Prepaid expenses, deposits and other 862,284 473,554
Investment in marketable securities 975,176 1,514,483
Accounts receivable, net 219,649 401,927
Right-of-use assets, net 67,568 74,643
Other intangibles, net 67,483 82,483
Notes receivable 316,374 316,374
Deferred offering costs 75,000 134,843
Total other assets $ 3,992,267 $ 4,658,504