Property, Plant, and Equipment, net (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended				12 Months Ended
	Mar. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Depreciation						$ 5,600	$ 3,700	$ 2,400
Net book value, equipment no longer to be utilized	$ 600			$ 600
Proceeds from disposal of property, plant and equipment	$ 100					82	474	100
Impairments of equipment		$ 38	$ 0	$ 468	$ 0	$ 0	$ 506	$ 0