FAIR VALUE MEASUREMENTS (Details) (USD $)	3 Months Ended				3 Months Ended
	Apr. 30, 2014	Jan. 31, 2014	Apr. 30, 2014 Guaranteed Payment [Member] Payment April 2015 [Member]	Apr. 30, 2014 Contingent upon Certain Milestones [Member] Payment April 2015 [Member]	Apr. 30, 2014 Interest Rate Swap [Member]	Apr. 30, 2013 Interest Rate Swap [Member]	Apr. 30, 2014 Interest Rate Swap [Member] Other Assets, Net [Member]	Jan. 31, 2014 Interest Rate Swap [Member] Other Assets, Net [Member]	Apr. 30, 2014 Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Recurring [Member]	Jan. 31, 2014 Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Recurring [Member]	Apr. 30, 2014 Significant Other Observable Inputs (Level 2) [Member] Recurring [Member]	Jan. 31, 2014 Significant Other Observable Inputs (Level 2) [Member] Recurring [Member]	Apr. 30, 2014 Significant Unobservable Inputs (Level 3) [Member] Recurring [Member]	Jan. 31, 2014 Significant Unobservable Inputs (Level 3) [Member] Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market mutual funds									$ 54,203,000	$ 57,204,000
Asset related to the interest rate swap											204,000	250,000
Contingent liability associated with acquisitions													(719,000)	(1,178,000)
Cash deposited with commercial banks	24,000,000	19,000,000
Derivatives, Fair Value [Line Items]
Description of variable rate basis					one month LIBOR
Total	204,000	250,000					204,000	250,000
Change in fair value recognized in net income					46,000	287,000
Key Assumptions [Abstract]
Discount rate (in hundredths)	4.60%
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration payable			$ 300,000	$ 500,000