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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Operating activities    
Net Income $ 192,218 $ 165,215
Adjustments to reconcile net income to net cash provided by operating activities:    
Amortization of intangible assets 59,286 59,285
Amortization of debt costs 6,297 23,148
Stock-based compensation 53,801 35,517
Changes in operating assets and liabilities    
(Increase) decrease in other receivables (21,020) (120,606)
(Increase) in other assets (16,975)
(Increase) decrease in prepaid expense (53,397) (70,356)
Increase (decrease) in accounts payable (19,895) 55,999
Increase (decrease) in accrued interest (3,379) 17,478
Increase in prepaid rent 348,132 116,033
Increase in deferred revenue (108,208) (109,119)
Net cash provided by operating activities 436,860 172,594
Financing Activities    
Principal payment on long-term debt (13,032) (13,044)
Cash dividends paid on preferred stock (69,968) (69,968)
Net cash used in financing activities (83,000) (83,012)
Net increase in cash and cash equivalents 353,860 89,582
Cash and cash equivalents, beginning of period 717,104 435,870
Cash and cash equivalents, end of period 1,070,964 525,452
Supplemental disclosure of cash flow information:    
Interest paid 121,603 100,759
Non-cash investing and financing activities:    
Purchase of land and intangibles with debt