Consolidated Statements of Cash Flows - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income		$ 10,362,448	$ 3,160,385	$ 22,006
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense		1,811,156	1,263,660	1,227,369
Depreciation and amortization expense		3,099,990	3,016,783	2,872,167
Provision for doubtful accounts		8,388	46,652	326,457
Deferred tax benefit		(5,478,818)		(583,420)
Disposal of property and equipment				4,979
Gain on insurance settlement				(301,281)
Changes in operating assets and liabilities:
(Increase) decrease in settlement assets		(957,909)	1,055,984	(703,407)
Decrease (increase) in accounts receivables, prepaid expenses and other current assets		346,422	(743,358)	(657,188)
Decrease (increase) in other long-term assets		911,138	(62,992)	(482,065)
Increase (decrease) in accounts payable and accrued expenses		1,292,718	(2,005,464)	336,367
Increase (decrease) in due to merchants		963,550	(419,222)	472,760
Other		(172,661)	(66,529)	(14,594)
Net cash provided by operating activities		12,186,422	5,245,899	2,520,150
Cash flows from investing activities:
Insurance proceeds				401,281
Increase in restricted cash		(44,501)	(1,738,571)	(26,638)
(Decrease) increase in merchant reserves		(75,322)	1,752,521
Purchase of property and equipment		(183,090)	(117,412)	(828,730)
Capitalized software development		(1,102,765)	(1,292,314)	(1,443,010)
Purchase of intangible assets		(20,979)	(125,980)	(162,181)
Net cash used in investing activities		(1,426,657)	(1,521,756)	(2,059,278)
Cash flows from financing activities:
Proceeds from issuance of common stock		1,657,591	934,032	589,131
Principal payments on capital lease obligations		(519,223)	(570,249)	(479,992)
Purchases of treasury stock		(7,060,409)	(822,603)
Net cash (used for) provided by financing activities		(5,922,041)	(458,820)	109,139
Effect of exchange rate changes on cash and cash equivalents	[1]	0	0	0
Net increase in cash and cash equivalents		4,837,724	3,265,323	570,011
Cash and cash equivalents at beginning of period		9,837,791	6,572,468	6,002,457
Cash and cash equivalents at end of period		14,675,515	9,837,791	6,572,468
Cash paid for:
Interest		33,499	64,585	63,352
Income taxes		765,380	765,807	568,055
Non-cash investing and financing activities:
Common stock issued for stock options and warrants exercised		184	1,390	2,273
Assets acquired under capital leases		156,129	429,611	728,082
Accrued capitalized hardware, software and fixed assets		57,163	74,017	27,566
Capitalized stock-based compensation		$ 33,001	$ 52,473	$ 52,133

[1] For the years ended December 31, 2015, 2014 and 2013, the effect of exchange rate changes on cash and cash equivalents was immaterial.