Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue:
Net revenue	$ 52,815,088	$ 47,368,739	$ 46,566,065
Cost of revenue:
Payment processing service fees	10,903,660	10,403,679	11,236,262
Processing and service costs	14,860,804	13,483,282	13,048,294
Total cost of revenue	25,764,464	23,886,961	24,284,556
Selling, general and administrative expenses	20,408,308	18,370,691	22,241,656
Restructuring charges	283,726	1,227,204
Total operating expenses	46,456,498	43,484,856	46,526,212
Income from operations	6,358,590	3,883,883	39,853
Other income (expense):
Interest expense	(57,575)	(65,122)	(66,905)
Interest income	1,579	2,212	1,038
Other income	89,494	139,875	88,889
Total other income, net	33,498	76,965	23,022
Income from operations before benefit (provision) for income taxes	6,392,088	3,960,848	62,875
Benefit (provision) for income taxes	3,970,360	(800,463)	(40,869)
Net income	$ 10,362,448	$ 3,160,385	$ 22,006
Basic net income per share applicable to common stockholders ( in dollars per share)	$ 0.17	$ 0.05	$ 0.00
Diluted net income per share applicable to common stockholders (in dollars per share)	$ 0.17	$ 0.05	$ 0.00
Weighted-average common stock outstanding (basic) (in shares)	52,545,934	53,494,952	52,943,203
Weighted-average common stock outstanding (diluted) (in shares)	53,271,248	54,633,181	54,465,285