Fair Value Measurement (Tables)

3 Months Ended

Apr. 30, 2013

Fair Value Disclosures [Abstract]

Financial assets and liabilities measured at fair value on a recurring basis

The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of April 30, 2013:

	Fair Value			Level 1		Level 2		Level 3
Bank certificates of deposit	$	7,833		$	—	$	7,833	$	—
Contingent consideration	(4,340		)	—		—		(4,340		)
Total	$	3,493		$	—	$	7,833	$	(4,340	)

The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of January 31, 2013:

	Fair Value			Level 1		Level 2		Level 3
Contingent consideration	$	(6,016	)	$	—	$	—	$	(6,016	)

Significant unobservable inputs

The fair value measurement of our contingent consideration as of April 30, 2013 encompasses the following significant unobservable inputs:

Unobservable Inputs	Range
Total estimated contingent consideration	$0	-	$5,733
Discount rate	14%	-	16%
Timing of cash flows (in years)	0	-	5

Summary of level 3 activity

The following table summarizes contingent consideration activity:

Balance as of January 31, 2013	$	6,016
Payments	(1,131		)
Adjustments	(603		)
Interest accretion	58
Balance as of April 30, 2013	$	4,340

Schedule of notes payable table

The following table summarizes the fair value and carrying value of notes payable:

As of	April 30, 2013		January 31, 2013
Fair value of notes payable	$	300,438	$	293,867
Carrying value of notes payable	$	219,937	$	218,546