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Property and Equipment (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Property, Plant and Equipment [Abstract]          
Gross carrying amount $ 19,246,360   $ 19,246,360   $ 19,755,489
Accumulated depreciation (18,387,382)   (18,387,382)   (18,580,547)
Property and Equipment, net 858,978   858,978   $ 1,174,942
Depreciation expense $ 135,669 $ 180,475 $ 321,754 $ 405,376