Quarterly report pursuant to sections 13 or 15(d)

Summary of Significant Accounting Policies (Tables)

v2.4.0.6
Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2012
Summary of Significant Accounting Policies [Abstract]  
Estimated useful lives of property and equipment
         
    Estimated useful lives  

Machinery and equipment

    3-20 years  

Furniture and fixtures

    5-7 years  

Computers and software

    3-7 years  

Leasehold improvements

    5 years  
Valuation assumptions used in computation of stock option expense
         
    Nine Months Ended September 30,
    2012   2011

Expected volatility

  75.8 – 115.4%   71.7 – 84.7%

Weighted-average volatility

  76.6%   81.0%

Risk-free interest rate

  0.4 – 0.9%   0.4 – 2.2%

Expected dividend

  0%   0%

Expected life in years

  3.5 – 8.6   3.5 – 8.6