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Basis of Presentation - Reconciliation of Cash and Cash Equivalents to Cash, Cash Equivalents and Merchant Reserves (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Cash and cash equivalents $ 2,636,378 $ 2,159,698 $ 2,319,980 $ 4,611,877
Prepaid card load assets 725,333 535,479 396,336 188,677
Merchant reserves 10,201,904 12,645,803 13,602,562 14,977,468
Total $ 13,563,615 $ 15,340,980 $ 16,318,878 $ 19,778,022