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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Operating activities    
Net Income $ 492,128 $ 173,897
Adjustments to reconcile net income to net cash provided by operating activities:    
Amortization of intangible assets 177,856 177,856
Amortization of debt costs 18,890 18,886
Stock-based compensation 148,526 142,029
Changes in operating assets and liabilities    
Decrease in other receivables 6,142
(Increase) in other assets (16,297) 53,156
(Increase) decrease in prepaid expenses (15,358) 6,658
Increase in accounts payable 60,543 17,232
Increase (decrease) in accrued interest (4,274) 18,900
Increase in prepaid rent 123,459
Increase in deferred revenue 59,677 174,944
Net cash provided by operating activities 1,045,150 789,700
Financing Activities    
Principal payment on long-term debt (337,244) (316,510)
Cash dividends paid on preferred stock (209,904) (209,904)
Net cash used in financing activities (547,148) (526,414)
Net increase in cash and cash equivalents 498,002 263,286
Cash and cash equivalents, beginning of period 717,104 435,870
Cash and cash equivalents, end of period 1,215,106 699,156
Supplemental disclosure of cash flow information:    
Interest paid $ 354,036 $ 359,188