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LONG-TERM DEBT (Details) $ / shares in Units, ¥ in Millions |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 25, 2019 USD ($) | Nov. 30, 2019 USD ($) | Nov. 30, 2019 CNY (¥) | Jul. 28, 2019 USD ($) | Apr. 30, 2019 USD ($) | Apr. 30, 2016 USD ($) shares $ / shares | Jan. 31, 2015 USD ($) shares $ / shares | Oct. 31, 2019 USD ($) | Oct. 31, 2019 CNY (¥) | Oct. 31, 2018 USD ($) | Oct. 29, 2017 USD ($) | Oct. 31, 2019 CNY (¥) | Mar. 31, 2011 USD ($)
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 44,029,000 |  | $ 57,453,000 |  |  |
Current portion of long-term debt |  |  |  |  |  |  |  | (2,142,000) |  | (57,453,000) |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 41,887,000 |  | 0 |  |  |
Weighted-average interest rate of short -term debt |  |  |  |  |  |  |  | 3.84% |  |  |  | 3.84% |
Interest payments |  |  |  |  |  |  |  | $ 2,600,000 |  | 1,900,000 | $ 2,100,000 |  |
Repayments of debt |  |  |  |  |  |  |  | 61,319,000 |  | 4,639,000 | 5,428,000 |  |
Proceeds from debt |  |  |  |  |  |  |  | 54,633,000 |  | 0 | $ 0 |  |
Maturities of Long-term Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2020 |  |  |  |  |  |  |  | 2,142,000 |  |  |  |  |
2021 |  |  |  |  |  |  |  | 8,304,000 |  |  |  |  |
2022 |  |  |  |  |  |  |  | 12,430,000 |  |  |  |  |
2023 |  |  |  |  |  |  |  | 3,441,000 |  |  |  |  |
2024 |  |  |  |  |  |  |  | 6,589,000 |  |  |  |  |
2025 |  |  |  |  |  |  |  | $ 11,123,000 |  |  |  |  |
Master Lease Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  | $ 35,000,000 |  |  |  |  |  |  |  |  |
Proceeds from debt | $ 3,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Master Lease Agreement [Member] | LIBOR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.00% |  |  |  |  |  |  |  |  |
Term of variable rate |  |  |  | 30 days |  |  |  |  |  |  |  |  |
Effective interest rate |  |  |  |  |  |  |  | 2.76% |  |  |  | 2.76% |
Project Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 34,490,000 |  | 0 |  |  |
Interest rate percentage |  |  |  |  |  |  |  | 4.90% |  |  |  | 4.90% |
Maturity date of debt |  |  |  |  |  |  |  | Dec. 31, 2025 | Dec. 31, 2025 |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 50,000,000 |  |  |  |  |
Proceeds from credit facility |  |  |  |  |  |  |  | $ 34,500,000 | ¥ 243.4 |  |  |  |
Date of first required payment |  |  |  |  |  |  |  | Jun. 30, 2020 | Jun. 30, 2020 |  |  |  |
Maturities of Long-term Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2020 |  |  |  |  |  |  |  | $ 1,275,000 |  |  |  |  |
2021 |  |  |  |  |  |  |  | 6,377,000 |  |  |  |  |
2022 |  |  |  |  |  |  |  | 5,685,000 |  |  |  |  |
2023 |  |  |  |  |  |  |  | 3,441,000 |  |  |  |  |
2024 |  |  |  |  |  |  |  | 6,589,000 |  |  |  |  |
2025 |  |  |  |  |  |  |  | 6,305,000 |  |  |  |  |
2026 |  |  |  |  |  |  |  | $ 4,818,000 |  |  |  |  |
Working Capital Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity date of debt |  |  |  |  |  |  |  | Jan. 31, 2022 | Jan. 31, 2022 |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 25,000,000.0 |  |  |  |  |
Maturities of Long-term Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2020 |  |  |  |  |  |  |  | 867,000 |  |  |  |  |
2021 |  |  |  |  |  |  |  | 1,927,000 |  |  |  |  |
2022 |  |  |  |  |  |  |  | $ 6,745,000 |  |  |  |  |
Working Capital Loans [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  | 0.2575% | 0.2575% |  |  |  |
Working Capital Loans [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  | 0.6775% | 0.6775% |  |  |  |
Working Capital Loans (value added tax component) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 9,539,000 |  | 0 |  |  |
Interest rate percentage |  |  |  |  |  |  |  | 4.90% |  |  |  | 4.90% |
Maximum borrowing capacity | ¥ |  |  |  |  |  |  |  |  |  |  |  | ¥ 140.0 |
Repayments of debt |  |  |  |  |  |  |  | $ 100,000 |  |  |  |  |
Amount outstanding under credit facility |  |  |  |  |  |  |  | $ 9,500,000 |  |  |  | ¥ 67.3 |
Working Capital Loans, Fund Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate percentage |  |  |  |  |  |  |  | 4.60% |  |  |  | 4.60% |
Maximum borrowing capacity | ¥ |  |  |  |  |  |  |  |  |  |  |  | ¥ 60.0 |
Proceeds from credit facility |  |  |  |  |  |  |  | $ 5,200,000 | ¥ 36.8 |  |  |  |
Term of loan |  |  |  |  |  |  |  | 1 year | 1 year |  |  |  |
Working Capital Loans, Fund Operations [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from credit facility |  | $ 1,100,000 | ¥ 8.0 |  |  |  |  |  |  |  |  |  |
3.25% Convertible Senior Notes Matured April 2019 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 0 |  | $ 57,453,000 |  |  |
Interest rate percentage |  |  |  |  |  |  |  | 3.25% |  |  |  | 3.25% |
Maturity date of debt |  |  |  |  |  |  |  | Apr. 01, 2019 | Apr. 01, 2019 |  |  |  |
Repayments of debt |  |  |  |  | $ 57,500,000 |  |  |  |  |  |  |  |
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
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 |  |  |  |  |  |  |
Amended and Restated Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 100,000,000 |  |  |  |  |
Term of loan |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |
Current borrowing capacity |  |  |  |  |  |  |  | $ 50,000,000 |  |  |  |  |
Cash limit for dividends, distributions and redemption on equity |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |
Cash limit for dividends, distributions and redemption on equity, annually thereafter |  |  |  |  |  |  |  | 50,000,000 |  |  |  |  |
Amount outstanding under credit facility |  |  |  |  |  |  |  | 0 |  |  |  |  |
Available borrowing capacity |  |  |  |  |  |  |  | $ 50,000,000 |  |  |  |  |
Effective interest rate |  |  |  |  |  |  |  | 2.78% |  |  |  | 2.78% |

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