CONSOLIDATED BALANCE SHEETS [Parenthetical](USD ($)) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Series A Convertible Preferred Stock [Member]	Dec. 31, 2011 Series A Convertible Preferred Stock [Member]
Accumulated amortization	$ 118	$ 0
Preferred stock,par value (in dollars per share)	$ 0.001	$ 0.001	$ 0.001	$ 0.001
Preferred stock, shares authorized	8,605,234	0	1,394,766	0
Preferred stock, shares issued	0	0	1,394,766	0
Preferred stock, shares outstanding	0	0	1,394,766	0
Preferred Stock, Liquidation Preference, Value			$ 4,547
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	3,251,187	2,108,732
Common stock, shares outstanding	3,251,187	2,108,732