FAIR VALUE MEASUREMENTS (Details) (USD $)	3 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Jan. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents deposited with commercial banks	$ 21,000,000		$ 22,000,000
Derivatives, Fair Value [Line Items]
The fair values of derivative instrument	(381,000)		(626,000)
Key Assumptions [Abstract]
Discount rate (in hundredths)	4.60%
Guaranteed Payment [Member]
Key Assumptions [Abstract]
Contingent consideration payable	300,000
Contingent upon Certain Milestones [Member]
Key Assumptions [Abstract]
Contingent consideration payable	500,000
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Description of variable rate basis	one month LIBOR
Change in fair value recognized in net income	(245,000)	46,000
Interest Rate Swap [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
The fair values of derivative instrument	(381,000)		(626,000)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market mutual funds	109,506,000		98,294,000
Significant Other Observable Inputs (Level 2) [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liability related to interest rate swap	(381,000)		(626,000)
Significant Unobservable Inputs (Level 3) [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent liability associated with acquisitions	$ 0		$ (750,000)