Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 74,840	$ 70,816
Less: accumulated depreciation and amortization	(34,638)	(30,669)
Total property and equipment, net	40,202	40,147
Computers, Software, and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	5,003	4,835
Site Operation Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	16,471	14,793
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	923	917
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	23,725	22,217
Capitalized Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 28,718	$ 28,054