Accrued expenses and other liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accrued expenses and other liabilities
Accrued construction in progress	$ 10,669	$ 21,696
Accrued customer liabilities	4,709	1,603
Revenue share	4,135	4,560
Salaries and wages	2,494	3,074
Accrued taxes	1,624	916
Accrued professional fees	1,113	651
Accrued partner network	934	969
Deferred rent	338	22
Other	3,271	2,837
Total accrued expenses and other liabilities	$ 29,287	$ 36,328