CONSOLIDATED STATEMENTS OF OPERATIONS and COMPREHENSIVE INCOME (LOSS) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues
Rental income	$ 2,333,238	$ 2,150,240
Total revenues	2,442,188	2,239,544
Expenses
Property operations	994,023	916,080
General and administrative	578,617	682,623
Depreciation and amortization	405,615	515,937
Business development		9,240
Total expenses	1,978,255	2,123,880
Operating income	463,933	115,664
Other income (expense)
Dividend and interest income	18,070	24,100
Unrealized gain (loss) on marketable equity securities	214,736	(190,405)
Interest expense	(285,492)	(305,783)
Total other (expense), net	(52,686)	(472,088)
Net income (loss) and comprehensive income (loss)	$ 411,247	$ (356,424)
Earnings per share
Basic	$ 0.04	$ (0.04)
Diluted	$ 0.04	$ (0.04)
Weighted average shares outstanding
Basic	9,292,488	9,262,811
Diluted	9,309,287	9,262,811
Other property related income
Revenues
Revenues	$ 90,753	$ 71,960
Management fees and other income
Revenues
Revenues	$ 18,197	$ 17,344