Consolidated Balance Sheets - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 7,283,792	$ 13,305,816
Restricted cash	5,552,887	4,981,472
Accounts receivable, net of allowances of $0.1 million as of June 30, 2017 and December 31, 2016	6,851,483	6,060,533
Prepaid expenses and other assets	2,100,989	1,940,544
Total current assets	21,789,151	26,288,365
Other assets:
Restricted cash	570,198	550,402
Property and equipment, net	1,607,115	1,674,410
Software development costs, net	4,153,393	4,197,142
Intangible assets, net	622,716	827,474
Goodwill	300,419	276,786
Deferred tax asset	22,119,464	22,673,206
Other long-term assets	1,555,719	2,095,817
Total other assets	30,929,024	32,295,237
Total assets	52,718,175	58,583,602
Current liabilities:
Accounts payable	635,063	830,479
Accrued expenses	4,095,501	5,353,735
Due to merchants	5,729,411	5,199,390
Current portion of capital leases	196,483	166,966
Total current liabilities	10,656,458	11,550,570
Long-term liabilities:
Long-term debt		9,916,000
Other long-term liabilities	589,970	854,991
Total long-term liabilities	589,970	10,770,991
Total liabilities	11,246,428	22,321,561
Commitments and contingencies (Note 8)
Stockholders' equity:
Convertible preferred stock-10,000,000 shares authorized as of June 30, 2017 and December 31, 2016, $0.01 par value: Series A-1,535,398 issued and outstanding as of June 30, 2017 and December 31, 2016; $6,141,592 aggregate liquidation preference as of June 30, 2017 and December 31, 2016	15,354	15,354
Common stock-250,000,000 shares authorized as of June 30, 2017 and December 31, 2016, $0.01 par value, and 60,232,922 shares issued and 49,857,568 shares outstanding as of June 30, 2017, and 59,666,333 shares issued and 49,290,979 shares outstanding as of December 31, 2016	602,329	596,663
Treasury stock, at cost, 10,375,354 shares as of June 30, 2017 and December 31, 2016	(31,726,486)	(31,726,486)
Additional paid-in capital	113,062,193	111,327,321
Accumulated other comprehensive loss	(572,309)	(654,408)
Accumulated deficit	(39,909,334)	(43,296,403)
Total stockholders' equity	41,471,747	36,262,041
Total liabilities and stockholders' equity	$ 52,718,175	$ 58,583,602