Goodwill and Intangible Assets, Net - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 51,889,000			$ 51,889,000
Goodwill impairment amount	$ 0		$ 0	$ 0
Weighted average remaining useful life	3 years 6 months
Amortization of intangible assets	$ 400,000	$ 400,000