Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Payables And Accruals [Abstract]
Employee bonuses		$ 36
Product warranty	$ 392	2,326	$ 951	$ 1,952
Compensated absences	1,509	1,653
Legal and professional fees	218	277
Payroll	692	581
Property and sales taxes	3,234	2,909
Medical claims	624	763
Other	1,180	1,134
Accrued expenses and other current liabilities	$ 7,849	$ 9,679