Stock-Based Compensation (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Schedule of stock option plans
Number of Shares Outstanding, Beginning	2,426,533
Number of Shares Granted	58,850
Number of Shares Exercised	(18,059)
Number of shares Forfeited or expired	(1,032,010)
Number of Shares Outstanding, Ending	1,435,314	2,426,533
Number of Shares Vested and exercisable	760,289
Weighted Average Exercise Price per Share Outstanding, Beginning	$ 4.01
Weighted Average Exercise Price per Share Granted	$ 1.68
Weighted average exercise price per share of options exercised	$ 1.00
Weighted Average Exercise Price per Share Forfeited or expired	$ 3.80
Weighted Average Exercise Price per Share Outstanding, Ending	$ 4.11	$ 4.01
Weighted Average Exercise Price per Share Vested and exercisable	$ 4.32
Weighted Average Remaining Contractual Term in Years Outstanding	7 years 10 months 24 days	7 years
Weighted Average Remaining Contractual Term in Years Vested and exercisable	7 years 2 months 12 days
Aggregate Intrinsic Value Outstanding	$ 0	$ 29
Aggregate Intrinsic Value Outstanding Vested and exercisable	$ 0