Accumulated Other Comprehensive Income (Loss)	6 Months Ended
Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	11. Accumulated Other Comprehensive Income (Loss) Other comprehensive income (loss) is composed of certain gains and losses that are excluded from net income under GAAP and instead recorded as a separate element of stockholders’ equity. For the three and six months ended March 31, 2019, the change in accumulated other comprehensive income (loss) was $1.5 million and $(2.4) million, respectively, and composed solely of foreign currency translation effects. There were no reclassifications out of accumulated other comprehensive income (loss) for the three and six months ended March 31, 2019.

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-URI http://asc.fasb.org/topic&trid=2134417

Name:	us-gaap_ComprehensiveIncomeNoteTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration