Segment information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 item	Sep. 30, 2012	Dec. 31, 2012
Segment information
Number of reportable segments			2
Segment information
Cost of sales included in processing and services costs	$ 3,230,876	$ 2,936,471	$ 9,585,178	$ 8,309,890
Long-lived assets	10,400,000		10,400,000		9,800,000
Number of geographical regions in which the entity conducts its business			3
Net Revenue:
Net revenue	10,472,912	9,925,137	34,323,638	31,723,111
Gross Profit:
Total gross profit	7,418,817	7,201,107	24,894,037	23,781,242
Multi-currency processing services
Segment information
Cost of sales included in processing and services costs	300,000		1,100,000
Net Revenue:
Net revenue	6,559,205	6,551,643	21,837,121	20,914,328
Gross Profit:
Total gross profit	6,247,630	6,551,643	20,701,263	20,914,328
Payment processing services
Net Revenue:
Net revenue	3,913,707	3,373,494	12,486,517	10,808,783
Number of individual customers with revenue greater than 10% of segment revenue			0
Gross Profit:
Total gross profit	1,171,187	649,464	4,192,774	2,866,914
APAC
Net Revenue:
Net revenue	3,629,098	3,760,580	11,140,930	12,014,840
Gross Profit:
Total gross profit	3,613,065	3,760,580	11,072,546	12,014,840
North America
Net Revenue:
Net revenue	1,622,659	1,391,131	4,741,143	3,467,390
Gross Profit:
Total gross profit	1,597,014	1,391,131	4,666,282	3,467,390
CEMEA
Net Revenue:
Net revenue	1,307,448	1,399,932	5,955,048	5,432,098
Gross Profit:
Total gross profit	$ 1,037,551	$ 1,399,932	$ 4,962,435	$ 5,432,098