CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income (loss)	$ 1,901,608	$ (41,444)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation and amortization	1,221,938	1,527,901
Unrealized gain on marketable equity securities	(791,189)	(27,402)
Amortization of loan procurement costs	155,176	149,946
Stock-based compensation	140,274	99,762
Changes in operating assets and liabilities:
Accounts receivable	321	95,006
Prepaid expenses and other assets	(158,656)	(275,825)
Accounts payable and accrued expenses	64,324	(310,392)
Net cash provided by operating activities	2,533,796	1,217,552
Cash flows from investing activities
Improvements and equipment additions	(243,626)	(194,787)
Construction		(1,402,573)
Net cash used in investing activities	(243,626)	(1,597,360)
Cash flows from financing activities
Issuance of common stock, net of expenses	6,184,684
Line of credit (repayment) borrowing, net	(5,144,000)	230,000
Issuance costs on renewal of revolving line of credit	(231,926)
Principal payments on note payable	(382,035)	(366,378)
Dividends paid	(1,913,512)	(1,819,845)
Net cash used in financing activities	(1,486,789)	(1,956,223)
Net increase (decrease) in cash, cash equivalents, and restricted cash	803,381	(2,336,031)
Cash, cash equivalents, and restricted cash, beginning of period	1,955,443	4,253,565
Cash, cash equivalents, and restricted cash, end of period	2,758,824	1,917,534
Supplemental cash flow and noncash information
Cash paid for interest	688,695	757,537
Supplemental disclosure of noncash activities:
Dividends payable	$ 2,079	$ 2,930