CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income	$ 187,823	$ 59,126
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Depreciation and amortization	351,644	348,873
Unrealized (gain) loss on marketable equity securities	(154,449)	41,907
Amortization of loan procurement costs	50,298	10,609
Compensation expense related to stock-based awards	54,160	884
Changes in operating assets and liabilities:
Accounts receivable	(23,736)	22,104
Prepaid expenses and other assets	(19,914)	(41,544)
Accounts payable and accrued expenses	167,521	125,650
Net cash provided by operating activities	613,347	567,609
Cash flows from investing activities
Construction	(22,401)	(28,008)
Improvements and equipment additions	(7,390)	(24,171)
Net cash used in investing activities	(29,791)	(52,179)
Cash flows from financing activities
Principal payments on note payable	(115,898)
Dividends paid	(499,044)	(495,266)
Net cash used in financing activities	(614,942)	(495,266)
Net (decrease) increase in cash and cash equivalents	(31,386)	20,164
Cash, cash equivalents, and restricted cash, beginning of period	1,712,266	2,256,415
Cash, cash equivalents, and restricted cash, end of period	1,680,880	2,276,579
Supplemental schedule of cash flow information
Interest paid	$ 207,200	$ 209,600