Financial Instruments - Schedule of Reconciliation of Warrant Liability (Details) $ in Thousands	3 Months Ended
Mar. 31, 2015 USD ($)
Fair Value Disclosures [Abstract]
Warrant liability, Beginning balance	$ 7,386
Decrease in fair value of warrant liability	(1,009)
Warrant liability, ending balance	$ 6,377

Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity.

No definition available.

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