Fair Value (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Summarizes of Fair Value of Assets Liabilities

The following table summarizes our assets and liabilities that require fair value measurements on a recurring basis and their respective input levels based on the fair value hierarchy:

	Estimated Fair Value		Quoted Market Prices for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
December 31, 2013:
Cash equivalents (1)	$	3,673	$	3,673	$	—	$	—
Short-Term Marketable Securities:
U.S. Treasury securities	1,503		1,503		—		—
U.S. government and agency securities	152		—		152		—
Commercial paper and certificates of deposit	1,300		—		1,300		—
Corporate debt securities	22,425		—		22,425		—
Municipal debt securities	500		—		500		—
Long-Term Marketable Securities:
Corporate debt securities	2,879		—		2,879		—
Total marketable securities:	28,759		1,503		27,256		—
Foreign currency forward contracts not designated as hedges	34		—		34		—
Total assets measured at fair value	$	32,466	$	5,176	$	27,290	$	—

(1) Cash equivalents are included in the Cash and cash equivalents line in the consolidated balance sheet

There were no transfers between Level 1 and Level 2 securities during the year ended December 31, 2013.

	Estimated Fair Value		Quoted Market Prices for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
December 31, 2012:
Cash equivalents (1)	$	46,043	$	46,043	$	—	$	—
Short-Term Marketable Securities:
U.S. Treasury securities	1,805		1,805		—		—
U.S. government and agency securities	3,023		—		3,023		—
Commercial paper and certificates of deposit	6,003		—		6,003		—
Corporate debt securities	16,020		—		16,020		—
Municipal debt securities	—		—		—		—
Long-Term Marketable Securities:
U.S. Treasury securities	1,521		1,521		—		—
U.S. government and agency securities	158		—		158		—
Corporate debt securities	10,869		—		10,869		—
Total assets at fair value	$	85,442	$	49,369	$	36,073	—
Liabilities:
Acquisition-related contingent consideration	$	241	$	—	$	—	$	241
Foreign currency forward contracts not designated as hedges	99		—		99		—
Total liabilities at fair value	$	340	$	—	$	99	$	241

(1) Cash equivalents are included in the Cash and cash equivalents line in the consolidated balance sheet

Summary of the Contingent Consideration Measured

The following table includes a summary of the contingent consideration measured at fair value using significant unobservable inputs (Level 3) during the year ended December 31, 2013 (in thousands):

Balance at December 31, 2012	$	241
Expenses recorded due to changes in fair value	9
Payments	(250		)
Balance at December 31, 2013	$	—

Summary of Note Receivable classified as Level 3 instrument

The note receivable is classified as a Level 3 instrument, as the inputs used in the analysis are unobservable and required significant management judgment.

	Estimated Fair Value		Quoted Market Prices for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(In thousands)
Promissory notes receivable	$	7,393	$	—	$	—	$	7,393