Fair Value Measurements (Tables)

9 Months Ended

Oct. 31, 2013

Fair Value Disclosures [Abstract]

Fair Value Hierarchy for Financial Assets Measured at Fair Value on Recurring Basis

The following table presents the fair value hierarchy for financial assets measured at fair value on a recurring basis as of January 31, 2013 (in thousands):

	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	7,637	$	—	$	—	$	7,637
Short-term investments
Commercial paper		—		2,097		—		2,097
Corporate notes and bonds		—		11,479		—		11,479
Certificate of deposits		—		700		—		700
Total	$	7,637	$	14,276		—	$	21,913

The following table presents the fair value hierarchy for financial assets measured at fair value on a recurring basis as of October 31, 2013 (in thousands):

	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	222,862	$	—	$	—	$	222,862
Short-term investments
Corporate notes and bonds		—		15,542		—		15,542
Certificate of deposits		—		700		—		700
Total	$	222,862	$	16,242		—	$	239,104