Fair Value Measurements - Foreign Exchange Contracts (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2017	Sep. 30, 2016
Assets:
Foreign exchange contracts	$ 4	$ 5
Liabilities:
Foreign exchange contracts	146	96
Significant Other Observable Inputs (Level 2)
Assets:
Foreign exchange contracts	4	5
Liabilities:
Foreign exchange contracts	$ 146	$ 96

Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

No definition available.

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