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Note 6 - Other Assets - Other Assets (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Investment in marketable securities, at fair value $ 1,514,483 $ 83,000
Deferred offering costs 100,000 100,000
Total other assets 4,658,504 3,422,781
Other Assets [Member]    
Deferred rent receivable 1,660,197 1,912,048
Prepaid expenses, deposits and other 473,554 215,946
Investment in marketable securities, at fair value 1,514,483 83,241
Accounts receivable, net 401,927 541,885
Right-of-use assets, net 74,643 102,144
Other intangibles, net 82,483 142,483
Notes receivable 316,374 316,374
Deferred offering costs 134,843 108,660
Total other assets $ 4,658,504 $ 3,422,781