Fair Value Measurements (Tables)

9 Months Ended

Oct. 31, 2015

Financial Assets Valued on a Recurring Basis, Based on the Priority of the Inputs to the Valuation Technique

In accordance with the provisions of the guidance, we categorized our financial assets, which are valued on a recurring basis, based on the priority of the inputs to the valuation technique for the instruments, as follows:



			Fair Value Measurements at Reporting Date Using
	Balance as of October 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

	(in thousands)
Current Assets
Cash equivalents:
Money market accounts	$	3,100	$	3,100	$	—	$	—
Marketable securities:
U.S. government agencies	17,817		—		17,817		—
Corporate bonds	27,256		—		27,256		—
Commercial paper	2,243		—		2,243		—
Non Current Assets
Deferred compensation plan	8,632		8,632		—		—
Total	$	59,048	$	11,732	$	47,316	$	—

	Balance as of January 31, 2015
Current Assets
Cash equivalents:
Money market accounts	$	338	$	338	$	—	$	—
Marketable securities:
Municipal securities	16,663		—		16,663		—
U.S. government securities	1,402		1,402		—		—
U.S. government agencies	26,299		—		26,299		—
Corporate bonds	79,202		—		79,202		—
Commercial paper	2,995		—		2,995		—
Non Current Assets
Deferred compensation plan	8,461		8,461		—		—
Total	$	135,360	$	10,201	$	125,159	$	—

	Balance as of November 1, 2014
Current Assets
Cash equivalents:
Money market accounts	$	2,721	$	2,721	$	—	$	—
Marketable securities:
Municipal securities	22,103		—		22,103		—
U.S. government securities	1,403		1,403		—		—
U.S. government agencies	20,313		—		20,313		—
Corporate bonds	49,225		—		49,225		—
Commercial paper	30,998		—		30,998		—
Non Current Assets
Deferred compensation plan	8,085		8,085		—		—
Total	$	134,848	$	12,209	$	122,639	$	—