LONG-TERM BORROWINGS (Details)	1 Months Ended		6 Months Ended
	Apr. 30, 2016 USD ($) shares	Jan. 31, 2015 USD ($) shares $ / shares	Apr. 30, 2017 USD ($)	Jan. 29, 2017 USD ($)	Oct. 30, 2016 USD ($)	Mar. 31, 2011 $ / shares
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations			$ 64,650,000		$ 67,288,000
Less current portion			5,503,000		5,428,000
Long-term debt and capital lease obligations non current			59,147,000		61,860,000
Debt Issuance Costs [Abstract]
Other Assets			3,865,000		3,792,000
Long-term Borrowings			$ 59,147,000		61,860,000
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			2.24%
ASU 2015-03 [Member] | Previously Reported [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations non current				$ 62,139,000
Debt Issuance Costs [Abstract]
Other Assets				4,071,000
Long-term Borrowings				62,139,000
ASU 2015-03 [Member] | Change Due to Adoption [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations non current				(279,000)
Debt Issuance Costs [Abstract]
Other Assets				(279,000)
Long-term Borrowings				(279,000)
ASU 2015-03 [Member] | Retrospectively Adjusted [Member]
Long-term borrowings [Abstract]
Long-term debt and capital lease obligations non current				61,860,000
Debt Issuance Costs [Abstract]
Other Assets				3,792,000
Long-term Borrowings				$ 61,860,000
3.25% Convertible Senior Notes due on April 2019 [Member]
Long-term borrowings [Abstract]
Convertible debt			$ 57,279,000		57,221,000
Interest rate percentage			3.25%
Maturity date of debt			Apr. 01, 2019
Face amount of debt			$ 57,500,000
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
3.25% Convertible Senior Notes due in April 2016 [Member]
Long-term borrowings [Abstract]
Interest rate percentage	3.25%
Maturity date of debt	Apr. 01, 2016
Face amount of debt	$ 57,500,000
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			$ 7,371,000		$ 10,067,000
Interest rate percentage			2.77%
Maturity date of debt			Jul. 31, 2018
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			$ 7,500,000
Interest included in lease payments			$ 100,000