Accrued expenses and other liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accrued expenses and other liabilities
Salaries and wages	$ 3,074	$ 2,389
Revenue share	4,560	5,683
Accrued partner network	969	1,105
Accrued for construction-in-progress	21,696	9,438
Settlement liabilities	0	1,850
Accrued professional fees	651	1,241
Accrued taxes	916	327
Deferred rent	22	18
Holdback liabilities	0	1,615
Contingent consideration	0	131
Other	4,440	2,312
Total accrued expenses and other liabilities	$ 36,328	$ 26,109