Warrants and Embedded Conversion Discount Derivative Liability (Detail)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Volatility	162.00%	173.00%
Risk-free interest rate	1.38%	1.65%

Risk-free interest rate assumption used in valuing an instrument.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration