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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2012
Summary of Significant Accounting Policies [Abstract]  
Estimated useful lives of the assets

Depreciation is computed by use of the straight-line method over the estimated useful lives of the assets, or the lease term if shorter, as follows:

 

         

Building and improvements

     3 - 20 years  

Machinery and equipment

     3 - 10 years  

Furniture and fixtures

     3 - 10 years  
Basic and dilutive net loss per share computations

The following are the basic and dilutive net loss per share computations for the last three fiscal years:

 

                         
    2012     2011     2010  

Net loss

   $ (28,491,153 )    $ (21,328,536 )    $ (25,243,551 ) 

Weighted average shares outstanding used to compute basic and diluted net loss per share

     28,824,417       14,187,885       12,330,299  

Basic and diluted net loss per share

   $ (0.99 )    $ (1.50 )    $ (2.05 ) 
Outstanding options, warrants and restricted stock units

Outstanding options, warrants and restricted stock units were excluded from the computation of diluted net loss per share because the effect would have been anti-dilutive for all periods presented below:

 

                         
    2012     2011     2010  

Outstanding options

     447,359       875,498       1,098,242  

Restricted stock units

     1,534,200       357,541       469,505  

Outstanding warrants

     9,935,912       17,434,483       1,434,483  
   

 

 

    

 

 

    

 

 

  

Total

     11,917,471       18,667,522       3,002,230  
   

 

 

    

 

 

    

 

 

  
Summary of components of accumulated OCI

The components of our accumulated OCI, as of December 31 of each year shown, are as follows:

 

                 
    2012     2011  

Net unrealized gain (loss) on marketable securities

   $ (1,356 )    $ (2,694 ) 

Unrealized gain on foreign currency translation

     194,533       43,407  
   

 

 

    

 

 

  

Accumulated other comprehensive income

   $ 193,177     $ 40,713