Property, Plant, and Equipment, net (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Property, Plant and Equipment [Abstract]
Depreciation expense					$ 3,700	$ 2,400	$ 2,100
Equipment held for disposal			$ 600
Estimated proceeds from sale equipment, net					100
Impairments	$ 38	$ 0	$ 468	$ 0	$ 506	$ 0	$ 0