Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Tax Expense (Benefit) [Abstract]

Schedule of Tax Effects of Temporary Differences that Give Rise to Significant Portions of Deferred Tax Assets and Liabilities

Deferred tax assets are summarized as follows:

		December 31,
		2012		2011
Deferred tax assets, current
Reserves	$	3,804,000	$	4,395,000
Other		710,000		806,000
Total gross deferred tax assets, current		4,514,000		5,201,000
Deferred tax assets, noncurrent
Net operating loss carryforwards		104,893,000		97,156,000
R&D credit carryforwards		6,032,000		5,754,000
Depreciation/amortization deferred		26,594,000		26,510,000
Other		7,573,000		6,958,000
Total gross deferred tax assets, noncurrent		145, 092,000		136,378,000
Net deferred taxes before valuation allowance		149,606,000		141,579,000
Less: Valuation allowance		(149,606,000)		(141,579,000)
Deferred tax assets	$	-	$	-