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Recent Accounting Pronouncements ASC 606 (Details) - USD ($) $ in Thousands	Oct. 01, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained deficit		$ (31,555)	$ (30,832)
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained deficit	$ 37,200	$ (34,969)
Deferred Revenue, Period Increase (Decrease)	$ 2,600

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(3))
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-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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