CONSOLIDATED STATEMENTS OF OPERATIONS and COMPREHENSIVE INCOME (LOSS) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues
Rental income	$ 2,460,667	$ 2,133,512	$ 4,793,905	$ 4,283,752
Total revenues	2,574,521	2,234,212	5,016,708	4,473,756
Expenses
Property operations	897,297	875,209	1,891,321	1,791,289
General and administrative	631,208	575,568	1,209,825	1,258,191
Depreciation and amortization	406,561	502,746	812,175	1,018,682
Business development	4,837	817	4,837	10,057
Total expenses	1,939,903	1,954,340	3,918,158	4,078,219
Operating income	634,618	279,872	1,098,550	395,537
Other income (expense)
Dividend and interest income	18,792	20,270	36,863	44,369
Unrealized gain (loss) on marketable equity securities	494,461	(27,764)	709,197	(218,169)
Interest expense	(286,572)	(294,522)	(572,064)	(600,305)
Total other income (expense), net	226,681	(302,016)	173,996	(774,105)
Net income (loss) and comprehensive income (loss)	$ 861,299	$ (22,144)	$ 1,272,546	$ (378,568)
Earnings per share
Basic	$ 0.09	$ 0.00	$ 0.14	$ (0.04)
Diluted	$ 0.09	$ 0.00	$ 0.14	$ (0.04)
Weighted average shares outstanding
Basic	9,363,981	9,269,567	9,328,432	9,266,189
Diluted	9,402,479	9,269,567	9,370,935	9,266,189
Other property related income
Revenues
Revenues	$ 95,069	$ 83,199	$ 185,821	$ 155,159
Management fees and other income
Revenues
Revenues	$ 18,785	$ 17,501	$ 36,982	$ 34,845