FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Oct. 31, 2015

FAIR VALUE MEASUREMENTS [Abstract]

Summary of financial assets and liabilities, measured at fair value

The following table sets forth the financial assets, measured at fair value, as of October 31, 2015 and January 31, 2015:

	Fair value measurement at reporting date using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
			(in thousands)
Money market mutual funds as of October 31, 2015	$	107,155
Money market mutual funds as of January 31, 2015	$	98,294
Liability related to the interest rate swap as of October 31, 2015			$	(462	)
Liability related to the interest rate swap as of January 31, 2015			$	(626	)
Contingent liability associated with acquisitions as of October 31, 2015						$	—
Contingent liability associated with acquisitions as of January 31, 2015						$	(750	)

Fair values of the derivative instrument

The fair values of the derivative instrument at October 31, 2015 and January 31, 2015 were as follows (in thousands):

	(Liability) derivative
		Fair Value
	Balance Sheet Location	October 31, 2015			January 31, 2015
Derivative instrument:
Interest rate swap	Other liabilities	$	(462	)	$	(626	)
Total		$	(462	)	$	(626	)