Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 57,855	$ 52,151
Less: accumulated depreciation and amortization	(19,798)	(16,754)
Total property and equipment, net	38,057	35,397
Computers, Software, and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	3,554	2,985
Site Operation Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	8,308	6,383
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	875	868
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	21,246	20,513
Capitalized Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 23,872	$ 21,402