Supporting Financial Information - Accounts Payable, Accrued Expense and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable	$ 3,393	$ 5,205
Accrued benefits	2,060	1,831
Accrued bonus and incentive compensation	2,191	1,544
Accrued workers compensation insurance	2,642	1,598
Other accrued expenses	664	717
Accounts payable, accrued expenses, and other current liabilities	$ 10,950	$ 10,895