Consolidated Balance Sheets - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 14,675,515	$ 9,837,791
Restricted cash	5,050,147	4,167,560
Accounts receivable, net of allowances of $0.1 million as of December 31, 2015 and December 31, 2014	6,406,496	6,948,595
Prepaid expenses and other assets	1,800,566	1,136,821
Total current assets	27,932,724	22,090,767
Other assets:
Restricted cash	551,917	432,094
Property and equipment, net	1,811,619	2,139,747
Software development costs, net	3,964,454	4,612,457
Intangible assets, net	1,378,264	2,046,700
Goodwill	286,852	319,671
Deferred tax asset and other long-term assets	8,581,082	2,289,858
Total other assets	16,574,188	11,840,527
Total assets	44,506,912	33,931,294
Current liabilities:
Accounts payable	306,520	512,057
Accrued expenses	6,438,600	2,918,645
Due to merchants	5,240,427	4,352,199
Current portion of capital leases	290,911	458,812
Total current liabilities	12,276,458	8,241,713
Long-term liabilities:
Other long-term liabilities	1,666,938	1,560,310
Total long-term liabilities	1,666,938	1,560,310
Total liabilities	$ 13,943,396	$ 9,802,023
Commitments and contingencies (Note 7)
Stockholders' equity:
Convertible preferred stock-10,000,000 shares authorized as of December 31, 2015 and December 31, 2014, $0.01 par value: Series A-2,243,750 issued and outstanding as of December 31, 2015 and December 31, 2014; $8,975,000 aggregate liquidation preference	$ 22,438	$ 22,438
Common stock-250,000,000 shares authorized as of December 31, 2015 and December 31, 2014, $0.01 par value, and 56,191,389 issued and 52,568,503 shares outstanding as of December 31, 2015, and 55,680,999 issued and 55,177,899 shares outstanding as of December 31, 2014	561,914	556,810
Treasury stock, at cost, 3,605,886 shares and 503,100 shares as of December 31, 2015 and December 31, 2014, respectively	(7,883,012)	(822,603)
Additional paid-in capital	106,741,026	103,277,253
Accumulated other comprehensive loss	(510,445)	(173,774)
Accumulated deficit	(68,368,405)	(78,730,853)
Total stockholders' equity	30,563,516	24,129,271
Total liabilities and stockholders' equity	$ 44,506,912	$ 33,931,294