Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Sep. 30, 2016
Payables and Accruals [Abstract]
Accounts payable	$ 7,104	$ 11,805
Accrued compensation and benefits	13,915	22,501
Other accrued expenses	10,317	8,239
Accounts payable and accrued expenses, total	$ 31,336	$ 42,545