Derivative Financial Instruments - Gross Fair Value of all Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019
Foreign Currency Forward Contracts \| Accrued Expenses and Other Current Liabilities
Derivatives Fair Value [Line Items]
Derivatives Liabilities	$ 26	$ 4

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

Name:	us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant