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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Gross property and equipment $ 9,433,837 $ 9,424,004
Less: Accumulated depreciation (9,105,223) (9,080,311)
Net property and equipment 328,614 343,693
Equipment [Member]    
Gross property and equipment 6,841,498 6,831,665
Leasehold Improvements [Member]    
Gross property and equipment $ 2,592,339 $ 2,592,339