Stockholders' Equity (Summary Of The Restricted Stock Unit Activity) (Details) (Restricted Stock Units [Member], USD $)	12 Months Ended
	Dec. 31, 2012
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding, December 31, 2011	98,820
Number of Shares, Granted	509,272
Number of Shares, Vested	(29,919)
Number of Shares, Forfeited	(48,861)
Number of Shares, Outstanding, December 31, 2012	529,312
Weighted Average Grant Date Fair Value per Share/Unit, Outstanding, December 31, 2011	$ 10.89
Weighted Average Grant Date Fair Value per Share/Unit, Granted	$ 1.89
Weighted Average Grant Date Fair Value per Share/Unit, Vested	$ 10.89
Weighted Average Grant Date Fair Value per Share/Unit, Forfeited	$ 6.51
Weighted Average Grant Date Fair Value per Share/Unit, Outstanding, December 31, 2012	$ 2.64