Consolidated Statements of Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue:
Net revenue	$ 12,516,383	$ 13,103,376	$ 25,245,268	$ 26,787,889
Cost of revenue:
Payment processing service fees	2,085,445	2,734,689	4,201,054	5,425,913
Processing and service costs	3,205,246	3,524,123	6,397,319	7,024,791
Total cost of revenue	5,290,691	6,258,812	10,598,373	12,450,704
Selling, general and administrative expenses	4,681,705	5,204,892	9,969,043	10,685,606
Restructuring charges	7,284	125,268	72,742	125,268
Total operating expenses	9,979,680	11,588,972	20,640,158	23,261,578
Income from operations	2,536,703	1,514,404	4,605,110	3,526,311
Other (expense) income:
Interest expense	(92,813)	(83,021)	(209,145)	(97,697)
Interest income	585	398	1,108	822
Total other expense, net	(92,228)	(82,623)	(208,037)	(96,875)
Income from operations before provision for income taxes	2,444,475	1,431,781	4,397,073	3,429,436
Provision for income taxes	(474,946)	(149,058)	(1,010,004)	(386,408)
Net income	$ 1,969,529	$ 1,282,723	$ 3,387,069	$ 3,043,028
Basic net income per share applicable to common stockholders ( in dollars per share)	$ 0.04	$ 0.02	$ 0.06	$ 0.06
Diluted net income per share applicable to common stockholders (in dollars per share)	$ 0.04	$ 0.02	$ 0.06	$ 0.05
Weighted-average common stock outstanding (basic) (in shares)	49,238,405	49,602,206	49,078,889	50,186,828
Weighted-average common stock outstanding (diluted) (in shares)	51,272,280	51,987,695	51,322,296	52,401,790