FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of cash equivalents, restricted cash and marketable securities by security type

Cash equivalents, restricted cash and marketable securities by security type at December 31, 2012 were as follows:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value

	(In thousands)
Included in cash and cash equivalents:
Money market funds	$	15,660	$	—	$	—		$	15,660
Corporate notes		3,136		—		(1	)		3,135

	$	18,796	$	—	$	(1	)	$	18,795

Restricted cash:
Certificates of deposit	$	794	$	—	$	—		$	794

Marketable securities:
Government-sponsored enterprise securities (due in less than 1 year)	$	8,618	$	5	$	—		$	8,623
Commercial paper (due in less than 1 year)		20,623		21		—			20,644
Corporate notes (due in less than 1 year)		44,190		22		(7	)		44,205

	$	73,431	$	48	$	(7	)	$	73,472

Cash equivalents, restricted cash and marketable securities by security type at December 31, 2011 were as follows:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value

	(In thousands)
Included in cash and cash equivalents:
Money market funds	$	12,885	$	—	$	—		$	12,885

Restricted cash:
Certificates of deposit	$	793	$	—	$	—		$	793

Marketable securities:
Certificate of deposit (due in less than 1 year)	$	329	$	—	$	—		$	329
Government-sponsored enterprise securities (due in less than 1 year)		15,061		25		(1	)		15,085
Government-sponsored enterprise securities (due in 1 to 2 years)		6,998		18		(12	)		7,004
Commercial paper (due in less than 1 year)		39,206		41		—			39,247
Corporate notes (due in less than 1 year)		50,556		19		(28	)		50,547
Corporate notes (due in 1 to 2 years)		25,113		30		(14	)		25,129

	$	137,263	$	133	$	(55	)	$	137,341

Schedule of marketable securities with unrealized losses

	Less Than 12 Months					12 Months or Greater				Total

	Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
	(In thousands)
As of December 31, 2012:
Corporate notes (due in less than 1 year)	$	27,045	$	(8	)	$	—	$	—	$	27,045	$	(8	)

As of December 31, 2011:
Government-sponsored enterprise securities (due in less than 1 year)	$	5,021	$	(1	)	$	—	$	—	$	5,021	$	(1	)
Government-sponsored enterprise securities (due in 1 to 2 years)		3,988		(12	)		—		—		3,988		(12	)
Corporate notes (due in less than 1 year)		33,847		(28	)		—		—		33,847		(28	)
Corporate notes (due in 1 to 2 years)		13,096		(14	)		—		—		13,096		(14	)

	$	55,952	$	(55	)	$	—	$	—	$	55,952	$	(55	)

Schedule of non-employee options to purchase common stock considered as derivatives and classified as current liabilities

			Number of Shares at December 31,						Fair Value at December 31,

	Exercise Price		Number of Shares at December 31,				Exercisable Date	Expiration Date	Fair Value at December 31,
Issuance Date	Exercise Price		2012		2011		Exercisable Date	Expiration Date	2012		2011
									(In thousands)
March 2005	$	6.39		284,600		284,600	January 2007	March 2015	$	51	$	64

Schedule of assumptions used to estimate the fair value of derivatives

	December 31,

	2012	2011
Dividend yield	None	None
Expected volatility	0.828	0.714
Risk-free interest rate	0.25%	0.36%
Expected term	2 yrs	3 yrs

Schedule of financial instruments measured at fair value on recurring basis

	Fair Value Measurements at Reporting Date Using

	Quoted Prices in Active Markets for Identical Assets/ Liabilities		Significant Other Observable Inputs		Significant Unobservable Inputs
(In thousands)	Level 1		Level 2		Level 3		Total
Assets
Money market funds⁽¹⁾	$	15,660	$	—	$	—	$	15,660
Government-sponsored enterprise securities⁽²⁾		—		8,623		—		8,623
Commercial paper⁽²⁾		—		20,644		—		20,644
Corporate notes⁽¹⁾⁽²⁾		—		47,340		—		47,340

Total	$	15,660	$	76,607	$	—	$	92,267

Liabilities
Derivatives⁽³⁾	$	—	$	—	$	51	$	51

(1): Included in cash and cash equivalents on our consolidated balance sheet.

(2): Included in current marketable securities on our consolidated balance sheet.
(3): Included in fair value of derivatives on our consolidated balance sheet.

Schedule of rollforward of the balance sheet amounts for financial instruments in Level 3 category

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Year Ended December 31, 2012

(In thousands)	Fair Value at December 31, 2011		Total Unrealized Gain Included in Earnings, net⁽¹⁾			Purchases, Sales, Issuances, Settlements, net		Transfers In and/or Out of Level 3		Fair Value at December 31, 2012		Change in Unrealized Gain Related to Financial Instruments Held at December 31, 2012⁽¹⁾
Derivative liabilities	$	64	$	(13	)	$	—	$	—	$	51	$	(13	)

(1): Reported as unrealized gain on derivatives in our consolidated statements of operations.

- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

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