Consolidated Statements of Stockholders' Equity Deficiency (USD $) In Thousands, except Share data	Total	PREFERRED STOCK	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	DEFICIT
Beginning Balance , Amount at Dec. 31, 2010	$ (6,741)	$ 720	$ 544	$ 20,958	$ (28,963)
Beginning Balance, Shares at Dec. 31, 2010		14	54,360
Net loss	(14,088)				(14,088)
Shares issued in connection with private transactions	1,018		39	979
Shares issued in connection with private transactions, shares			3,933
Stock issued to non-employees for consulting services	46		2	44
Stock issued to non-employees for consulting services, shares			250
Warrants issued to employees	1,666			1,666
Warrants issued to nonemployees for services	145			145
Warrants issued to nonemployees for services, share
Warrants issued in connection with debt financings	200			200
Beneficial conversion in connection with debt financings	192			192
Conversion of Series C preferred stock to common stock		(198)	13	185
Conversion of Series C preferred stock to common stock, shares		(4)	1,254
Reacquisition and cancellation of common stock	(150)		(6)	(144)
Reacquisition and cancellation of common stock, shares			(545)
Issuance of stock options	1,230			1,230
Ending Balance, Amount at Dec. 31, 2011	(16,482)	522	592	25,455	(43,051)
Ending Balance, Shares at Dec. 31, 2011		10	59,252
Net loss	(6,990)				(6,990)
Stock issued to non-employees for consulting services	16		2	14
Stock issued to non-employees for consulting services, shares			200
Warrants issued to employees	(25)			(25)
Warrants Issued to employees, shares
Warrants issued to nonemployees for services	2			2
Warrants issued in connection with debt financings	9			9
Warrants issued in connection with debt financings, shares
Issuance of unvested Series D preferred stock	373			373
Issuance of stock options	154			154
Options exercised
Ending Balance, Amount at Dec. 31, 2012	$ (22,943)	$ 522	$ 594	$ 25,982	$ (50,041)
Ending Balance, Shares at Dec. 31, 2012		10	59,452