Asset Held for Sale and Disposal (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
Nov. 01, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Assets held for sale		$ 0			$ 0		$ 35
Gain on disposal or impairment of operating assets		$ 0	$ 282	$ 29	$ 282	$ 1,429
Proceeds from sale of machinery and equipment	$ 317

Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 15
-Paragraph 4
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=77912953&loc=d3e400-110220

Name:	us-gaap_AssetsHeldForSaleNotPartOfDisposalGroupCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant