FAIR VALUE MEASUREMENTS (Details) - USD ($)	1 Months Ended	6 Months Ended
	Mar. 31, 2015	Jul. 31, 2015	Jul. 31, 2014	Jan. 31, 2015
Key Assumptions [Abstract]
Discount rate (in hundredths)		4.60%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents deposited with commercial banks		$ 20,000,000		$ 22,000,000
Derivatives, Fair Value [Line Items]
The fair values of derivative instrument		(275,000)		(626,000)
Maximum [Member]
Key Assumptions [Abstract]
Contingent liability paid	$ 800,000
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		110,476,000		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		(275,000)		(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)
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Change in fair value recognized in net income		351,000	$ (107,000)
Interest Rate Swap [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
The fair values of derivative instrument		$ (275,000)		(626,000)
Guaranteed Payment [Member]
Key Assumptions [Abstract]
Contingent consideration payable				300,000
Contingent upon Certain Milestones [Member]
Key Assumptions [Abstract]
Contingent consideration payable				$ 500,000