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Equity Incentive Plans (Tables)
6 Months Ended
Jun. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Employee Stock Ownership Plan (ESOP) Disclosures [Table Text Block]

The following table sets forth, by the respective option plan, certain aspects of DCT’s stock options as of June 30, 2012:

 

    Option Approval Method     Options Outstanding and Options Available  
Description   Board of
Directors
    Board of
Directors
and
Shareholders
    Total     Outstanding     Available
For 
Future
Grant
    Total  
2002 Amended and Restated Stock Option Plan           3,200,000       3,200,000       2,753,710       446,290       3,200,000  
2006 Stock Option Plan           2,500,000       2,500,000       2,299,000       201,000       2,500,000  
2009 Stock Option Plan           1,500,000       1,500,000       1,179,333       320,667       1,500,000  
2010 Stock Option Plan           3,500,000       3,500,000       2,500,000       1,000,000       3,500,000  
Key Personnel Option Grants     7,875,000             7,875,000       4,518,465             4,518,465  
      7,875,000       10,700,000       18,575,000       13,250,508       1,967,957       15,218,465
Schedule Stock-based Compensation Expense Included in Statement of Operation [Table Text Block]

The following table sets forth the total stock-based compensation expense included in DCT’s Statements of Operations (in thousands):

 

    Three Months Ended
June 30,
    Six Months Ended
June 30,
 
    2012     2011     2012     2011  
Selling, general and administrative   $ 235     $ 293     $ 468     $ 584  
Research and development     21       31       35       62  
Total   $ 256     $ 324     $ 503     $ 646  
Schedule of Share-based Compensation Stock Options Award Activity [Table Text Block]

DCT had the following stock option activity during the six months ended June 30, 2012:

 

    Options     Weighted-
Average
Exercise
Price
 
Outstanding at December 31, 2011     14,524,358     $ 0.34  
Granted     275,000       0.35  
Exercised     (1,498,850 )     (0.01 )
Cancelled     (50,000 )     (0.32 )
Outstanding at June 30, 2012     13,250,508     $ 0.38  
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

The following table summarizes all options outstanding and exercisable by price range as of June 30, 2012:

 

      Options Outstanding     Options Exercisable  
Range of
Exercise Prices
    Number
Outstanding
    Weighted-
Average
Remaining
Contractual
Life (Years)
    Weighted-
Average
Exercise
Price
    Number
Exercisable
    Weighted-
Average
Exercise
Price
 
$ 0.01       643,465     0.8     $ 0.01       643,465     $ 0.01  
$0.29-$0.45       9,707,043     5.8     $ 0.32       7,189,642     $ 0.31  
$0.60 - $0.70       2,900,000     6.4     $ 0.68       2,200,000     $ 0.68  
          13,250,508                     10,033,107