LONG-TERM BORROWINGS (Details)		1 Months Ended		9 Months Ended
	Apr. 30, 2016 USD ($) shares	Jan. 31, 2015 USD ($) shares $ / shares	Mar. 31, 2011 USD ($) shares $ / shares	Jul. 31, 2016 USD ($)	Nov. 01, 2015 USD ($)
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations				$ 68,900,000	$ 132,615,000
Less current portion				5,846,000	65,495,000
Long-term debt and capital lease obligations non current				$ 63,054,000	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 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
3.25% Convertible Senior Notes due on April 2016 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations				$ 0	57,500,000
Interest rate percentage				3.25%
Maturity date of debt				Apr. 01, 2016
Repayments of convertible debt	$ 50,100,000
Conversion of debt to common stock (in shares) | shares	700,000
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				$ 11,400,000	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				$ 11,700,000
Interest included in lease payments				300,000
3.09% Capital Lease Obligation Payable through March 2016 [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations				$ 0	$ 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