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Share-based Compensation (Details 1) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Options outstanding beginning of period 144,019 144,039
Number of Options, Granted 741,535 5,833
Issuance of common stock upon exercise of stock options, for cash, shares      
Number of Options Forfeited, cancelled or expired (42,112) (5,853)
Options outstanding, end of period 843,442 144,019
Options exercisable, end of period, Number of Options 194,550 125,666
Options vested and expected to vest, Number of Options 832,941  
Weighted Average exercise Price, Options Outstanding, Beginning of period $ 18.28 $ 19.20
Weighted average exercise price, Granted $ 1.38 $ 6.00
Weighted average exercise price, Exercised      
Weighted average exercise price, Forfeited, cancelled or expired $ 11.62 $ 27.96
Weighted Average exercise Price, Options Outstanding, end of period $ 3.76 $ 18.28
Weighted average exercise price, Options exercisable, end of period $ 11.14 $ 18.77
Weighted Average exercise Price, Options vested and expected to vest, end of period $ 3.78