Property, Plant and Equipment, Net - Additional Information (Details) - USD ($) $ in Thousands		1 Months Ended	4 Months Ended	12 Months Ended
	Sep. 05, 2014	Sep. 30, 2014	Jan. 31, 2015	Jan. 30, 2016	Sep. 30, 2014	Sep. 30, 2013
Property Plant And Equipment [Line Items]
Aggregate depreciation and amortization expense of property, plant and equipment			$ 5,112	$ 17,109	$ 14,957	$ 12,275
Sale of executive offices and distribution facility	$ 12,522
Gain recognized under sale transaction		$ 4,110			4,110
Retail Locations
Property Plant And Equipment [Line Items]
Impairment write-downs of property, plant and equipment			1,090	$ 1,659	1,136	$ 754
Material Equipment and Leasehold Improvements
Property Plant And Equipment [Line Items]
Construction in progress related to relocations		$ 20,893	$ 24,161		$ 20,893