Accrued expenses and other liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accrued expenses and other liabilities
Accrued construction in progress	$ 6,611	$ 6,753
Revenue share	4,751	5,611
Accrued customer liabilities	4,222	4,651
Salaries and wages	2,545	3,001
Accrued professional fees	1,919	1,183
Accrued taxes	1,752	1,761
Accrued partner network	1,017	1,022
Deferred rent	376	354
Other	2,134	3,387
Total accrued expenses and other liabilities	$ 25,327	$ 27,723