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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Operating activities    
Net Income $ 410,703 $ 422,139
Adjustments to reconcile net income to net cash provided by operating activities:    
Amortization of intangible assets 118,570 118,570
Amortization of debt costs 12,595 12,595
Stock-based compensation 111,081 90,592
Changes in operating assets and liabilities    
(Decrease)/Increase in accounts payable related party (1,374) 99
(Decrease) in other assets (71,430) (74,408)
(Decrease) in prepaid expenses (34,954) (16,346)
(Decrease)/Increase in accounts payable 16,901 (640)
(Decrease) in accrued interest (3,454) (3,721)
Increase in deferred revenue 76,889 76,464
Net cash provided by operating activities 635,527 625,344
Financing Activities    
Principal payment on long-term debt (132,629) (117,315)
Cash dividends paid on preferred stock (140,116) (140,116)
Net cash used in financing activities (272,745) (257,431)
Net increase in cash and cash equivalents 362,782 367,913
Cash and cash equivalents, beginning of period 1,771,011 1,146,730
Cash and cash equivalents, end of period 2,133,793 1,514,643
Supplemental disclosure of cash flow information:    
Interest paid $ 222,629 $ 236,439