Employee Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 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 December 31, 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		2,149,000		351,000		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		5,075,000		–		5,075,000		4,518,465		–		4,518,465
		5,075,000		10,700,000		15,775,000		13,100,508		2,117,957		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):

	Years Ended December 31,
	2012		2011
Selling, general and administrative	$	809	$	1,162
Research and development		69		108
	$	878	$	1,270

Schedule of Share-based Compensation Stock Options Award Activity [Table Text Block]

Additional information with respect to stock option activity is as follows:

	Options			Weighted- Average Exercise Price
Outstanding at December 31, 2010		15,244,498		$	0.34
Granted		1,143,710			0.39	*
Cancelled		(1,765,000	)		0.38
Exercised		(98,850	)		0.01
Outstanding at December 31, 2011		14,524,358		$	0.34
Granted		275,000			0.35	*
Cancelled		(200,000	)		0.32
Exercised		(1,498,850	)		0.01
Outstanding at December 31, 2012		13,100,508		$	0.38
Vested or expected to vest at December 31, 2012		13,100,508		$	0.38

* Approximates the weighted-average fair value.

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 December 31, 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		0.31	$	0.01		643,465	$	0.01
$0.29-$0.45		9,557,043		5.27	$	0.32		8,519,534	$	0.31
$0.60 - $0.70		2,900,000		5.85	$	0.68		2,900,000	$	0.68
		13,100,508						12,062,999