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LONG-TERM DEBT (Details) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 07, 2018 USD ($) | Nov. 30, 2018 USD ($) | Nov. 30, 2018 USD ($) | Apr. 30, 2016 USD ($) shares $ / shares | Jan. 31, 2015 USD ($) shares $ / shares | Oct. 31, 2018 USD ($) | Oct. 29, 2017 USD ($) | Oct. 30, 2016 USD ($) | Mar. 31, 2011 USD ($)
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |
Long-term debt and capital lease obligations |  |  |  |  |  | $ 57,453,000 | $ 61,976,000 |  |
Less: current portion |  |  |  |  |  | 57,453,000 | 4,639,000 |  |
Long-term debt and capital lease obligations non current |  |  |  |  |  | 0 | 57,337,000 |  |
Interest payments |  |  |  |  |  | 1,900,000 | 2,100,000 | $ 3,200,000 |
3.25% Convertible Senior Notes due in April 2019 [Member] |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |
Convertible debt |  |  |  |  |  | $ 57,453,000 | 57,337,000 |  |
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 debt [Abstract] |  |  |  |  |  |  |  |  |
Interest rate percentage |  |  |  | 3.25% |  |  |  |  |
Maturity date of debt |  |  |  | Apr. 01, 2016 |  |  |  |  |
Face amount of debt |  |  |  |  |  |  |  |  | $ 57,500,000
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 debt [Abstract] |  |  |  |  |  |  |  |  |
Long-term debt and capital lease obligations |  |  |  |  |  | $ 0 | $ 4,639,000 |  |
Interest rate percentage |  |  |  |  |  | 2.77% |  |  |
Maturity date of debt |  |  |  |  |  | Jul. 31, 2018 |  |  |
Face amount of debt |  |  |  |  |  | $ 26,400,000 |  |  |
Term of loan agreement |  |  |  |  |  | 5 years |  |  |
Periodic payments |  |  |  |  |  | $ 500,000 |  |  |
Frequency of periodic payment |  |  |  |  |  | per month |  |  |
Project Loan Agreement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 50,000,000 | $ 50,000,000 |  |  |  |  |  |
Term of loan agreement |  | 8 years |  |  |  |  |  |  |
Working Capital Loan Agreement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |
Date of loan agreement | Nov. 07, 2018 |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 25,000,000 |  |  |  |  |  |  |  |
Proceeds from line of credit |  |  | $ 2,200,000 |  |  |  |  |  |
Working Capital Loan Agreement [Member] | Subsequent Event [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |
Term of loan agreement | 3 years |  |  |  |  |  |  |  |
Amended and Restated Credit Agreement [Member] |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |
Maturity date of debt |  |  |  |  |  | Sep. 30, 2023 |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 100,000,000 |  |  |
Current borrowing capacity |  |  |  |  |  | 50,000,000 |  |  |
Amount outstanding under credit facility |  |  |  |  |  | 0 |  |  |
Available borrowing capacity |  |  |  |  |  | $ 50,000,000 |  |  |
Effective interest rate |  |  |  |  |  | 2.30% |  |  |

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