Commitments and Contingencies - Additional Information (Detail) $ in Millions	Sep. 30, 2015 USD ($)
Contingencies And Commitments [Line Items]
Amount at issue with regard to purchase arrangement	$ 1.2
Inventory and Accounts Payable [Member]
Contingencies And Commitments [Line Items]
Amount intended to be returned	$ 0.2

Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a)(4),(5))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_InventoryRawMaterialsAndSupplies
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant