Consolidated Balance Sheets - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 13,305,816	$ 14,675,515
Restricted cash	4,981,472	5,050,147
Accounts receivable, net of allowances of $0.1 million as of December 31, 2016 and December 31, 2015	6,060,533	6,406,496
Prepaid expenses and other assets	1,940,544	1,800,566
Total current assets	26,288,365	27,932,724
Other assets:
Restricted cash	550,402	551,917
Property and equipment, net	1,674,410	1,811,619
Software development costs, net	4,197,142	3,964,454
Intangible assets, net	827,474	1,378,264
Goodwill	276,786	286,852
Deferred tax asset	22,673,206	6,206,313
Other long-term assets	2,095,817	2,374,769
Total other assets	32,295,237	16,574,188
Total assets	58,583,602	44,506,912
Current liabilities:
Accounts payable	830,479	306,520
Accrued expenses	5,353,735	6,438,600
Due to merchants	5,199,390	5,240,427
Current portion of capital leases	166,966	290,911
Total current liabilities	11,550,570	12,276,458
Long-term liabilities:
Long-term debt	9,916,000
Other long-term liabilities	854,991	1,666,938
Total long-term liabilities	10,770,991	1,666,938
Total liabilities	22,321,561	13,943,396
Commitments and contingencies (Note 7)
Stockholders' equity:
Convertible preferred stock-10,000,000 shares authorized as of December 31, 2016 and December 31, 2015, $0.01 par value: Series A-1,535,398 issued and outstanding as of December 31, 2016 and 2,243,750 issued and outstanding as of December 31, 2015; $6,141,592 and $8,975,000 aggregate liquidation preference as of December 31, 2016 and December 31, 2015, respectively	15,354	22,438
Common stock-250,000,000 shares authorized as of December 31, 2016 and December 31, 2015, $0.01 par value, and 59,666,333 issued and 49,290,979 shares outstanding as of December 31, 2016, and 56,191,389 issued and 52,585,503 shares outstanding as of December 31, 2015	596,663	561,914
Treasury stock, at cost, 10,375,354 shares and 3,605,886 shares as of December 31, 2016 and December 31, 2015, respectively	(31,726,486)	(7,883,012)
Additional paid-in capital	111,327,321	106,741,026
Accumulated other comprehensive loss	(654,408)	(510,445)
Accumulated deficit	(43,296,403)	(68,368,405)
Total stockholders' equity	36,262,041	30,563,516
Total liabilities and stockholders' equity	$ 58,583,602	$ 44,506,912