Revenue by Geographic Location - Schedule of Revenue by Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total revenue	$ 91,827	$ 68,096	$ 256,610	$ 190,143
Other
Segment Reporting Information [Line Items]
Total revenue	5,211	3,896	14,595	10,851
United States
Segment Reporting Information [Line Items]
Total revenue	62,966	46,084	175,765	128,806
EMEA
Segment Reporting Information [Line Items]
Total revenue	16,732	13,036	47,225	36,043
APAC
Segment Reporting Information [Line Items]
Total revenue	$ 6,918	$ 5,080	$ 19,025	$ 14,443