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Fair Value of Assets and Liabilities (Details 1) (USD $)
3 Months Ended 6 Months Ended 9 Months Ended
Dec. 31, 2011
Jun. 30, 2012
Sep. 30, 2012
Assumptions and other inputs used to compute the fair value of the warrant liability      
Common stock price $ 1.05 $ 1.06 $ 1.03
Expected warrant exercise price $ 1.46 $ 1.46 $ 1.46
Remaining term of warrant (years) 4 years 9 months 18 days 4 years 4 months 24 days 4 years 1 month 6 days
Expected volatility 58.00% 61.00% 60.00%
Average risk free interest rate 0.80% 0.60% 0.50%
Expected dividend yield         
Expected percentage of warrants to be exercised 100.00% 100.00% 100.00%