Fair Value Disclosures (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments Measured at Fair Value on Recurring Basis

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

	December 31, 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)
	(In thousands)
Assets:
U.S. Treasury securities	$	0	$	56,976	$	0	$	56,976
Money market funds		10,075		0		0		10,075
Total assets at fair value	$	10,075	$	56,976	$	0	$	67,051

The above table excludes $4.1 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)
	(In thousands)
Assets:
U.S. Treasury securities	$	0	$	38,988	$	0	$	38,988
Money market funds		52		0		0		52
Total assets at fair value	$	52	$	38,988	$	0	$	39,040

Schedule of Short-Term Investments

Short-term Investments

	December 31, 2013
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
	(In thousands)
U.S. Treasury securities	$	56,966	$	10	$	0	$	56,976
Total	$	56,966	$	10	$	0	$	56,976

	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