Note 12 - Segments - Assets by Reportable Segment (Details) - USD ($)		Jun. 30, 2022	Dec. 31, 2021
Total assets		$ 289,096,123	$ 161,196,763
Cash, cash equivalents and restricted cash		21,066,945	14,702,089
Other assets, net		3,876,429	4,658,504
Operating Segments [Member]
Total assets		126,461,991	135,080,107
Segment Reconciling Items [Member]
Total assets		289,096,123	161,196,763
Cash, cash equivalents and restricted cash		12,154,873	6,738,345
Other assets, net		150,479,259	19,378,311
Office/Industrial Properties [Member] | Operating Segments [Member]
Land, buildings and improvements, net	[1]	77,224,583	78,240,086
Total assets	[2]	78,900,054	76,453,436
Model Home Properties [Member] | Operating Segments [Member]
Land, buildings and improvements, net	[1]	32,009,456	34,089,046
Total assets	[2]	30,652,005	31,047,202
Retail Properties [Member] | Operating Segments [Member]
Land, buildings and improvements, net	[1]	16,227,501	25,693,239
Total assets	[2]	$ 16,909,932	$ 27,579,469

[1] Includes lease intangibles and the land purchase option related to property acquisitions.

[2] Includes land, buildings and improvements, current receivables, deferred rent receivables and deferred leasing costs and other related intangible assets, all shown on a net basis.