Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 4,715,206	$ 6,002,457
Restricted cash	2,773,485	2,517,616
Accounts receivable, net of allowances of $0.2 million as of September 30, 2013 and $1.5 million as of December 31, 2012	6,419,717	5,585,815
Prepaid expenses and other assets	1,975,654	2,395,137
Total current assets	15,884,062	16,501,025
Other assets:
Restricted cash	429,360	669,406
Property and equipment, net	2,124,950	1,396,154
Software development costs, net	5,026,711	4,776,320
Intangible assets, net	2,890,315	3,289,590
Goodwill	355,673	347,599
Security deposits and other assets	1,207,737	338,408
Total other assets	12,034,746	10,817,477
Total assets	27,918,808	27,318,502
Current liabilities:
Accounts payable	1,215,656	889,118
Accrued expenses	3,314,284	5,298,789
Due to merchants	2,351,156	2,546,140
Current portion of capital leases liability	442,657	337,588
Total current liabilities	7,323,753	9,071,635
Long-term liabilities:
Long-term portion of capital leases liability and deferred income	1,407,690	364,010
Total long-term liabilities	1,407,690	364,010
Total liabilities	8,731,443	9,435,645
Commitments and contingencies (Note 10)
Stockholders' equity:
Convertible preferred stock- 10,000,000 shares authorized as of September 30, 2013 and December 31, 2012, $0.01 par value: Series A- 2,243,750 issued and outstanding as of September 30, 2013 and December 31, 2012; $8,975,000 aggregate liquidation preference	22,438	22,438
Common stock-250,000,000 shares authorized as of September 30, 2013 and December 31, 2012, $0.01 par value, and 54,570,679 and 53,658,857 issued and outstanding as of September 30, 2013 and December 31, 2012, respectively	545,707	536,589
Additional paid-in capital	100,578,442	99,199,149
Accumulated other comprehensive gain	85,969	37,925
Accumulated deficit	(82,045,191)	(81,913,244)
Total stockholders' equity	19,187,365	17,882,857
Total liabilities and stockholders' equity	$ 27,918,808	$ 27,318,502