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Name:	us-gaap_CapitalLeasedAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Long-term Obligation - Buildout of facility (Details) - USD ($) $ in Thousands	Jan. 01, 2015	Sep. 30, 2017
Capital lease
Lease term	20 years
Property Plant And Equipment
Construction costs related to buildout of the facility
Build-to-suit liability		$ 4,100