Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Schedule Of Deferred Taxes

		December 31,
		2012			2011
Deferred tax assets:
NOL carry-forwards	$	137,870		$	124,695
Research and development credit		8,085			8,085
Deferred revenue		3,808			7,227
Investments		-			4,266
Stock-based compensation		2,831			3,108
Other		2,375			2,262
		154,969			149,643
Deferred tax liabilities:
Investments		(4,953	)		-
Other		(389	)		(420	)
Net deferred tax asset before valuation allowance		149,627			149,223
Valuation allowance		(149,627	)		(149,223	)
Net deferred tax assets	$	-		$	-