Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income	$ 3,387,069	$ 3,043,028
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	574,519	1,180,899
Depreciation and amortization expense	1,045,495	1,330,238
Provision for doubtful accounts	3,437	58,595
Deferred income taxes	553,742
Disposal of property and equipment		500
Changes in operating assets and liabilities:
(Increase) decrease in settlement assets	(571,415)	498,553
(Increase) decrease in accounts receivables, prepaid expenses and other current assets	(881,941)	358,980
Decrease in other long-term assets	514,274	287,923
Decrease in accounts payable and accrued expenses	(1,664,578)	(2,885,420)
Increase (decrease) in due to merchants	530,021	(438,099)
Other	52,065	(26,219)
Net cash provided by operating activities	3,542,688	3,408,978
Cash flows from investing activities:
Increase in restricted cash	(19,796)	(9,629)
Increase in merchant reserve		9,684
Purchase of property and equipment	(209,550)	(109,555)
Capitalized software development	(415,646)	(677,822)
Purchase of intangible assets	(12,296)	(353)
Net cash used in investing activities	(657,288)	(787,675)
Cash flows from financing activities:
Proceeds from issuance of common stock	1,293,738	1,965,380
Principal payments on capital lease obligations	(148,902)	(193,002)
Borrowings under credit facility		13,916,000
Repayments under credit facility	(9,916,000)	(4,000,000)
Purchase of treasury stock		(17,843,447)
Common stock repurchases for tax withholdings	(136,260)	(655,104)
Net cash used in financing activities	(8,907,424)	(6,810,173)
Net decrease in cash and cash equivalents	(6,022,024)	(4,188,870)
Cash and cash equivalents at beginning of period	13,305,816	14,675,515
Cash and cash equivalents at end of period	7,283,792	10,486,645
Cash paid for:
Interest	172,261	14,718
Income taxes	579,114	504,398
Non-cash investing and financing activities:
Common stock issued for preferred stock conversion		21,629
Common stock issued for stock options exercised	262	98
Assets acquired under capital leases	47,067	122,630
Accrued capitalized hardware, software and fixed assets	77,259	63,291
Capitalized stock-based compensation	$ 8,541	$ 14,018