2.	FAIR VALUE MEASUREMENTS

Cash Equivalents and Short-term Investments

The financial instruments of the Company measured at fair value on a recurring basis are cash equivalents and short-term investments.

The Company’s fixed income available-for-sale securities consist of high quality, investment grade securities. The Company values these securities based on pricing from pricing vendors, who may use quoted prices in active markets for identical assets (Level 1) or inputs other than quoted prices that are observable either directly or indirectly (Level 2) in determining fair value.

The types of instruments valued based on quoted market prices in active markets include most money market securities. Such instruments are generally classified within Level 1 of the fair value hierarchy.

The types of instruments valued based on quoted prices in markets that are less active, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency are generally classified within Level 2 of the fair value hierarchy and include most U.S. treasury securities and most investment-grade corporate commercial paper.

The types of instruments valued based on unobservable inputs which reflect the reporting entity’s own assumptions or data that market participants would use in valuing an instrument are generally classified within Level 3 of the fair value hierarchy.

Financial instruments measured at fair value on a recurring basis as of September 30, 2013 and December 31, 2012 are classified based on the valuation technique in the table below:


	September 30, 2013 Fair value measurements using						Total
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(In thousands)
Assets:
U.S. Treasury securities	$	0	$	56,990	$	0	$	56,990
Money market accounts		3,064		0		0		3,064

Total assets at fair value	$	3,064	$	56,990	$	0	$	60,054

The above table excludes $4.6 million of cash held in banks.


	December 31, 2012 Fair value measurements using						Total
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(In thousands)
Assets:
U.S. Treasury securities	$	0	$	38,988	$	0	$	38,988
Money market accounts		52		0		0		52

Total assets at fair value	$	52	$	38,988	$	0	$	39,040

The above table excludes $4.5 million of cash held in banks.

Short-term Investments


	September 30, 2013
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
	(In thousands)
U.S. Treasury securities	$	47,976	$	14	$	0	$	47,990

Total	$	47,976	$	14	$	0	$	47,990


	December 31, 2012
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
	(In thousands)
U.S. Treasury securities	$	38,980	$	8	$	0	$	38,988

Total	$	38,980	$	8	$	0	$	38,988

The contractual maturities of the Company’s available-for-sale securities on September 30, 2013 and December 31, 2012 were all due within one year.