Derivative Liability (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended				2 Months Ended		1 Months Ended			1 Months Ended				1 Months Ended					1 Months Ended		6 Months Ended
	Mar. 31, 2011	Jun. 30, 2012	Dec. 31, 2011	Dec. 31, 2010 Series B Preferred Stock [Member]	Mar. 31, 2012 Series C Preferred Stock [Member]	Dec. 31, 2010 Series C Preferred Stock [Member]	Sep. 30, 2011 September 2011 Note And Warrant Purchase Agreement [Member]	Jun. 30, 2012 September 2011 Note And Warrant Purchase Agreement [Member]	Sep. 20, 2011 September 2011 Note And Warrant Purchase Agreement [Member]	Dec. 31, 2011 December 2011 Note And Warrant Purchase Agreement [Member]	Jun. 30, 2012 December 2011 Note And Warrant Purchase Agreement [Member]	Feb. 29, 2012 December 2011 Note And Warrant Purchase Agreement [Member]	Dec. 20, 2011 December 2011 Note And Warrant Purchase Agreement [Member]	Feb. 29, 2012 December 2011 Note And Warrant Purchase Agreement [Member] Common stock [Member]	Aug. 31, 2010 August Two Thousand Ten Series B Financing [Member]	Dec. 31, 2010 December Two Thousand Ten Series C Financing [Member]	Mar. 31, 2011 March Two Thousand Eleven Series C Financing [Member]	Jun. 30, 2012 March Two Thousand Eleven Series C Financing [Member]	Aug. 31, 2011 Warrants Issued To Consultants [Member]	Jun. 30, 2012 Warrants Issued To Consultants [Member]	Jun. 30, 2012 Series B Financing [Member]	Jun. 30, 2012 Series C Financing [Member]
Derivative Liability, Fair Value, Net [Abstract]
Loss resulting from revaluation of conversion features on preferred stock	$ 47
Decrease in the derivative liability, resulted from the reclassification of derivative value to equity	362
Subsidiary, Sale of Stock [Line Items]
Number of shares sold in private placement															1,440	2,211	800				8,380	2,211
Number of common shares callable by warrants									5,556				5,556				1,778
Number of warrants outstanding											556								1,000
Fair value of warrants outstanding, initial									7				13						1
Fair value of warrants outstanding								13			2									2
Risk-free interest rate							42.00%			39.00%									7.00%
Expected term							3 years			3 years									3 years
Volatility							204.00%			202.00%									190.00%
Fair Value Assumptions, Expected Dividend Rate							0.00%			0.00%									0.00%
Exercise period of warrants							3 years			3 years									3 years
Warrants, expiration date							Aug. 11, 2014			Aug. 11, 2012									Aug. 11, 2014
Number of shares issued by warrants excercise												5,000		4,043
Number of shares issued by warrants excercise, cashless												4,889
Number of shares issued by warrants excercise, for cash												111
Proceeds from issuance of common stock, related to warrants exercise					140									2
Fair value of the derivative liability		$ 225	$ 281	$ 136		$ 179											$ 4	$ 4