Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2015

Fair Value Disclosures [Abstract]

Fair Value of Financial Assets and Liabilities Measured on Recurring Basis

The following tables set forth our financial assets and liabilities that were accounted for at fair value on a recurring basis as of January 31, 2015 and January 31, 2014:

			Fair Value at January 31, 2015 Using
	January 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(Amounts in thousands)
Financial assets:
Money market accounts (a)	$	1,575	$	1,575	$	—	$	—
Available for sale marketable securities:
Current marketable securities:
U.S. treasury notes and bonds—conventional		1,501		1,501		—		—
U.S. government agency issues		6,015		—		6,015		—
Non-current marketable securities:
U.S. treasury notes and bonds—conventional		4,286		4,286
U.S. government agency issues		2,507		—		2,507		—
Total	$	15,884	$	7,362	$	8,522	$	—

			Fair Value at January 31, 2014 Using
	January 31, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(Amounts in thousands)
Financial assets:
Money market accounts (a)	$	3,463	$	3,463	$	—	$	—
Available for sale marketable securities:
Current marketable securities:
U.S. treasury notes and bonds—conventional		3,545		3,545		—		—
U.S. government agency issues		2,010		—		2,010		—
Non-current marketable securities:
U.S. government agency issues		6,814		—		6,814		—
Total	$	15,832	$	7,008	$	8,824	$	—

a) Money market funds and U.S. treasury bills are included in cash and cash equivalents on the accompanying consolidated balance sheet and are valued at quoted market prices for identical instruments in active markets.

Summary of Available-for-Sale Securities

The following is a summary of cash, cash equivalents and available-for-sale securities, including the cost basis, aggregate fair value and unrealized gains and losses, for short-and long-term marketable securities portfolio as of January 31, 2015 and 2014:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(Amounts in thousands)
January 31, 2015:
Cash	$	88,444	$	—	$	—	$	88,444
Cash equivalents		1,575		—		—		1,575
Cash and cash equivalents		90,019		—		—		90,019
U.S. treasury notes and bonds—short-term		1,500		1				1,501
U.S. treasury notes and bonds—long-term		4,268		18		—		4,286
U.S, government agency issues—short-term		6,008		7		—		6,015
U.S, government agency issues—long-term		2,490		17				2,507
Total cash, cash equivalents and marketable securities	$	104,285	$	43	$	—	$	104,328
January 31, 2014:
Cash	$	112,271	$	—	$	—	$	112,271
Cash equivalents		3,463		—		—		3,463
Cash and cash equivalents		115,734		—		—		115,734
U.S. treasury notes and bonds—short-term		3,540		5				3,545
U.S. government agency issues—short-term		2,005		5				2,010
U.S. government agency issues—long-term		6,806		8		—		6,814
Total cash, cash equivalents and marketable securities	$	128,085	$	18	$	—	$	128,103

Schedule of Contractual Maturities Available-for-Sale Debt Securities

Contractual maturities of available-for-sale debt securities at January 31, 2015 are as follows (amounts in thousands):

	Estimated Fair Value
Maturity of one year or less	$	7,516
Maturity between one and five years		6,793
Total	$	14,309