Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Mar. 31, 2016
Income Tax Contingency [Line Items]
Increase (decrease) in gross unrecognized tax benefits	$ 400,000	$ 700,000
Reasonably possible change in unrecognized tax benefits in the next twelve months	$ 0	$ 0
Scenario Forecast [Member]
Income Tax Contingency [Line Items]
Effective income tax rate			36.00%