Supporting Financial Information - Other Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Document Fiscal Year Focus			2017
Interest expense, net	$ (219)	$ (206)	$ (662)		$ (206)
Amortization of deferred financing costs	(70)	(50)	(194)	$ 0	(50)
Increase (Decrease) in Derivative Assets and Liabilities	3	0	(49)
Other income (expense), net	17	(118)	17		$ (820)
Other income (expense) net	$ (269)	$ (374)	$ (888)	$ (1,076)