LONG-TERM BORROWINGS (Details)	1 Months Ended		3 Months Ended
	Jan. 31, 2015 USD ($) shares $ / shares	Mar. 31, 2011 USD ($) shares $ / shares	Jan. 31, 2016 USD ($)	Nov. 01, 2015 USD ($)
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations			$ 130,179,000	$ 132,615,000
Less current portion			63,955,000	65,495,000
Long-term debt and capital lease obligations non current			$ 66,224,000	67,120,000
Credit Facility [Member]
Long-term borrowings [Abstract]
Maturity date of debt			Dec. 31, 2018
Current borrowing capacity			$ 50,000,000
Maximum borrowing capacity			75,000,000
Amount outstanding under credit facility			0
Available borrowing capacity			$ 50,000,000
Interest rate			1.73%
3.25% convertible senior notes due on April 1, 2016 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations			$ 57,500,000	57,500,000
Interest rate percentage			3.25%
Maturity date of debt			Apr. 01, 2016
Number of shares each note is convertible to (in shares) | shares		96
Face amount of each note converted		$ 1,000
Conversion price per share (in dollars per share) | $ / shares		$ 10.37
3.25 convertible senior notes due on April 2019 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations			$ 57,500,000	57,500,000
Interest rate percentage			3.25%
Maturity date of debt			Apr. 01, 2019
Number of shares each note is convertible to (in shares) | shares	96
Face amount of each note converted	$ 1,000
Conversion price per share (in dollars per share) | $ / shares	$ 10.37
2.77% capital lease obligation payable through July 2018 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations			$ 14,040,000	15,346,000
Interest rate percentage			2.77%
Maturity date of debt			Jul. 31, 2018
Original face amount of debt			$ 26,400,000
Repayment period of debt			5 years
Periodic payments			$ 500,000
Frequency of periodic payment			per month
Amount payable through the end of lease term			$ 14,500,000
Interest included in lease payments			500,000
3.09% capital lease obligation payable through March 2016 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations			$ 1,139,000	$ 2,269,000
Interest rate percentage			3.09%
Maturity date of debt			Mar. 30, 2016
Original face amount of debt			$ 21,200,000
Repayment period of debt			5 years
Periodic payments			$ 400,000
Frequency of periodic payment			per month
Amount payable through the end of lease term			$ 1,100,000