Fair Value of Financial Instruments (Details 3) (Derivative liability, USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013
Derivative liability
Roll-forward of the fair value of the derivative liability categorized as Level 3 instruments
Balance at the beginning of the period	$ 196
Portion of convertible notes issued in February 2013 allocated to derivative	35
Balance at the end of the period	$ 231

This element represents a liability measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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