Commitments and Contingencies (Details) (Ontario Grant, CAD)	1 Months Ended	48 Months Ended
Jun. 30, 2011	Oct. 31, 2014
Ontario Grant
Gain Contingencies [Line Items]
Grant amount	25,000,000.0
Grant period	November 1, 2010 to October 31, 2015
Benefit recorded to date		23,100,000
Grants receivable		3,100,000

Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants.

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 210.5-02.8)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 8

-Article 5

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