Long-Term Debt - Other (Details) - China - Notes Payable to Banks - Other Export Financing Arrangements - USD ($)	Jun. 30, 2019	Sep. 30, 2018
Debt Instrument [Line Items]
Debt default, amount	$ 35,000,000
Long-term debt outstanding	$ 25,000,000	$ 22,000,000

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant