Segment Reporting Revenue and Property and Equipment by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net revenue									$ 253,388	$ 209,336	$ 162,413
Depreciation and amortization expense									10,437	9,007	6,113
Net income (loss)	$ (2,925)	$ (1,325)	$ 27	$ (528)	$ (1,076)	$ (1,680)	$ (1,892)	$ (472)	(4,751)	(5,120)	1,926
Total assets	333,855				313,452				333,855	313,452
Property and equipments, net	16,384				12,375				16,384	12,375
Americas
Net revenue									227,914	185,241	150,764
Depreciation and amortization expense									6,842	5,776	4,739
Net income (loss)									2,557	940	5,433
Total assets	284,011				261,886				284,011	261,886
Property and equipments, net	11,803				9,733				11,803	9,733
Europe
Net revenue									25,474	24,095	11,649
Depreciation and amortization expense									3,595	3,231	1,374
Net income (loss)									(7,308)	(6,060)	$ (3,507)
Total assets	49,844				51,566				49,844	51,566
Property and equipments, net	$ 4,581				$ 2,642				$ 4,581	$ 2,642