Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_NotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Convertible Notes (Summary of Series 2012 Notes) (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Feb. 17, 2015	Oct. 20, 2014	Feb. 12, 2014	Feb. 06, 2014	Aug. 01, 2013
Debt Instrument [Line Items]
Convertible Notes Payable, Carrying Value	$ 232,847	$ 253,828
Series 2012 Notes [Member]
Debt Instrument [Line Items]
Convertible Notes, Principal Balance Outstanding			$ 22,300			$ 48,300	$ 180,000
Unamortized discount of liability component				$ (100)	$ (2,100)