Summary of Significant Accounting Policies (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014
Changes in financial instruments measured at fair value using Level 3 inputs
Beginning balance		$ 89
Financing derivative		89
Ending balance		89
Warrant [Member]
Changes in financial instruments measured at fair value using Level 3 inputs
Beginning balance	157	89
Reclassification to additional paid-in capital upon conversion to common stock warrant	(157)
Financing derivative		89
Ending balance		$ 89