Organization And Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

Organization And Summary Of Significant Accounting Policies [Abstract]


	December 31,
	2011			2010
Customer A		20	%		23	%
Customer B		10	%		16	%
Customer C		10	%		3	%
Customer D		6	%		12	%

Comprehensive Loss


	Years Ended December 31,
	2011			2010			2009
Net loss	$	(44,746	)	$	(55,170	)	$	(53,524	)
Unrealized gain (loss) on available-for-sale marketable securities		9			(5	)		(54	)
Foreign currency translation loss		(23	)		(48	)		(9	)

Comprehensive loss	$	(44,760	)	$	(55,223	)	$	(53,587	)

Fair Value Hierarchy For Financial Assets


	Fair Value Measurements Using
	Level 1		Level 2		Level 3		Total
Marketable securities, available for sale
U.S. government agencies		0	$	61,896		0	$	61,896
Commercial paper		0	$	7,497		0	$	7,497
Corporate debt		0	$	9,965		0	$	9,965

Total marketable securities, available for sale		0	$	79,358			$	79,358
Restricted cash	$	939		0		0	$	939


	Fair Value Measurements Using
	Level 1		Level 2		Level 3		Total
Cash equivalents		0	$	1,000		0	$	1,000
Marketable securities, available for sale
U.S. government agencies		0	$	32,222		0	$	32,222
Commercial paper		0	$	4,996		0	$	4,996
Corporate debt		0	$	5,006		0	$	5,006

Total marketable securities, available for sale		0	$	42,224			$	42,224
Restricted cash	$	1,714		0		0	$	1,714

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

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- Definition

Tabular disclosure of components of comprehensive income (loss) including, but not limited to: (a) foreign currency translation adjustments; (b) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (c) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (d) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (e) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (f) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (g) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans.

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- Definition

Tabular disclosure of the nature of a concentration, a benchmark to which it is compared, and the percentage that the risk is to the benchmark.

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