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Stock-based Compensation (Details 1) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Stock option activities of company    
Option outstanding beginning of period 144,039 158,873
Number of option granted 5,833 27,450
Number of options exercised    (188)
Number of options forfeited and cancelled (5,853) (42,096)
Options outstanding end of the period 144,019 144,039
Options exercisable, end of period, Number of Options 125,666 102,691
Options vested and expected to vest, Number of Options 142,227  
Weighted Average exercise Price, Options Outstanding, beginning of period $ 19.20 $ 191.22
Weighted Average exercise Price, Options Outstanding, end of period $ 18.28 $ 19.20
Weighted average exercise price, Granted $ 6.00 $ 13.44
Weighted average exercise price, Exercised $ 0.00 $ 7.86
Weighted average exercise price, Forfeited and cancelled $ 27.96 $ 664.86
Weighted average exercise price, Options exercisable, end of period $ 18.77 $ 20.10
Weighted Average exercise Price, Options vested and expected to vest, end of period $ 18.30