FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of information about assets that are measured at fair value on a recurring basis

	Fair value measurements at reporting date using
	Quoted prices in active
	markets for identical		Significant other		Significant
	assets		observable inputs		unobservable inputs		Balance as of
Description	(Level 1)		(Level 2)		(Level 3)		September 30, 2013
Cash equivalents:
Money market funds	$	5,958	$	—	$	—	$	5,958
Short-term investments:
Government securities	—		16,876		—		16,876
Total	$	5,958	$	16,876	$	—	$	22,834

	Fair value measurements at reporting date using
	Quoted prices in active				Significant
	markets for identical		Significant other		unobservable
	assets		observable inputs		inputs		Balance as of
Description	(Level 1)		(Level 2)		(Level 3)		December 31, 2012
Cash equivalents:
Money market funds	$	11,157	$	—	$	—	$	11,157
Government securities	—		2,015		—		2,015
Short-term investments:
Government securities	—		29,201		—		29,201
Long-term investments:
Government securities	—		2,508		—		2,508
Total	$	11,157	$	33,724	$	—	$	44,881

- 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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