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v3.19.2

DEBT (Details) $ / shares in Units, ¥ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 25, 2019 USD ($) | Jul. 28, 2019 USD ($) | Apr. 30, 2019 USD ($) | Apr. 30, 2016 USD ($) shares $ / shares | Jan. 31, 2015 USD ($) shares $ / shares | Jul. 28, 2019 USD ($) | Jul. 28, 2019 CNY (¥) | Jul. 28, 2019 USD ($) | Jul. 28, 2019 CNY (¥) | Jul. 29, 2018 USD ($) | Jul. 28, 2019 CNY (¥) | Oct. 31, 2018 USD ($) | Mar. 31, 2011 USD ($)
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 49,115,000 |  |  |  | $ 49,115,000 |  | $ 49,115,000 |  |  |  | $ 57,453,000 |
Current portion |  | (6,100,000) |  |  |  | (6,100,000) |  | (6,100,000) |  |  |  | (57,453,000) |
Long-term debt noncurrent |  | 43,015,000 |  |  |  | 43,015,000 |  | 43,015,000 |  |  |  | 0 |
Repayments of debt |  |  |  |  |  |  |  | 61,319,000 |  | $ 4,170,000 |  |  |
Master Lease Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | 35,000,000 |  |  |  | 35,000,000 |  | 35,000,000 |  |  |  |  |
Amount outstanding under credit facility |  | $ 0 |  |  |  | 0 |  | 0 |  |  |  |  |
Master Lease Agreement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Advance payment for equipment | $ 3,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Master Lease Agreement [Member] | LIBOR [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.00% |  |  |  |  |  |  |  |  |  |  |
Term of variable rate |  | 30 days |  |  |  |  |  |  |  |  |  |  |
Project Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 35,419,000 |  |  |  | $ 35,419,000 |  | $ 35,419,000 |  |  |  | 0 |
Interest rate percentage |  | 4.90% |  |  |  | 4.90% |  | 4.90% |  |  | 4.90% |  |
Maximum borrowing capacity |  | $ 50,000,000 |  |  |  | $ 50,000,000 |  | $ 50,000,000 |  |  |  |  |
Maturity date of debt |  |  |  |  |  |  |  | Dec. 31, 2025 | Dec. 31, 2025 |  |  |  |
Date of first required payment |  |  |  |  |  |  |  | Jun. 30, 2020 | Jun. 30, 2020 |  |  |  |
Proceeds from credit facility |  |  |  |  |  | 9,600,000 |  | $ 35,400,000 | ¥ 243.4 |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2020 (all within one year of July 28, 2019) |  | 1,310,000 |  |  |  | 1,310,000 |  | 1,310,000 |  |  |  |  |
2021 |  | 6,548,000 |  |  |  | 6,548,000 |  | 6,548,000 |  |  |  |  |
2022 |  | 5,838,000 |  |  |  | 5,838,000 |  | 5,838,000 |  |  |  |  |
2023 |  | 3,533,000 |  |  |  | 3,533,000 |  | 3,533,000 |  |  |  |  |
2024 |  | 6,766,000 |  |  |  | 6,766,000 |  | 6,766,000 |  |  |  |  |
2025 |  | 6,476,000 |  |  |  | 6,476,000 |  | 6,476,000 |  |  |  |  |
2026 |  | 4,948,000 |  |  |  | 4,948,000 |  | 4,948,000 |  |  |  |  |
Working Capital Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | 13,696,000 |  |  |  | 13,696,000 |  | 13,696,000 |  |  |  | 0 |
Maximum borrowing capacity |  | $ 25,000,000.0 |  |  |  | $ 25,000,000.0 |  | $ 25,000,000.0 |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  | 0.6775% | 0.6775% |  |  |  |
Maturity date of debt |  |  |  |  |  |  |  | Jan. 31, 2022 | Jan. 31, 2022 |  |  |  |
Working Capital Loans, VAT [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate percentage |  | 5.00% |  |  |  | 5.00% |  | 5.00% |  |  | 5.00% |  |
Maximum borrowing capacity |  | $ 20,400,000 |  |  |  | $ 20,400,000 |  | $ 20,400,000 |  |  | ¥ 140.0 |  |
Repayments of debt |  |  |  |  |  | 100,000 |  |  |  |  |  |  |
Proceeds from credit facility |  |  |  |  |  |  |  | 9,900,000 | ¥ 68.0 |  |  |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
2020 (all within one year of July 28, 2019) |  | 890,000 |  |  |  | 890,000 |  | 890,000 |  |  |  |  |
2021 |  | 1,979,000 |  |  |  | 1,979,000 |  | 1,979,000 |  |  |  |  |
2022 |  | $ 6,927,000 |  |  |  | $ 6,927,000 |  | $ 6,927,000 |  |  |  |  |
Working Capital Loans, Fund Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate percentage |  | 4.60% |  |  |  | 4.60% |  | 4.60% |  |  | 4.60% |  |
Maximum borrowing capacity |  | $ 8,700,000 |  |  |  | $ 8,700,000 |  | $ 8,700,000 |  |  | ¥ 60.0 |  |
Proceeds from credit facility |  |  |  |  |  | 3,900,000 | ¥ 11.4 |  |  |  |  |  |
Term of loan |  |  |  |  |  |  |  | 1 year | 1 year |  |  |  |
3.25% Convertible Senior Notes Matured April 2019 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | 0 |  |  |  | 0 |  | $ 0 |  |  |  | $ 57,453,000 |
Face amount of debt |  | $ 57,500,000 |  |  |  | $ 57,500,000 |  | $ 57,500,000 |  |  |  |  |
Interest rate percentage |  | 3.25% |  |  |  | 3.25% |  | 3.25% |  |  | 3.25% |  |
Maturity date of debt |  |  |  |  |  |  |  | Apr. 01, 2019 | 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 |  |  |  |  |  |  |  |
Repayments of debt |  |  | $ 57,500,000 |  |  |  |  |  |  |  |  |  |
Amended and Restated Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  | $ 100,000,000 |  |  |  | $ 100,000,000 |  | $ 100,000,000 |  |  |  |  |
Current borrowing capacity |  | 50,000,000 |  |  |  | 50,000,000 |  | 50,000,000 |  |  |  |  |
Amount outstanding under credit facility |  | 0 |  |  |  | 0 |  | $ 0 |  |  |  |  |
Term of loan |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |
Cash limit for dividends, distributions and redemption on equity |  | 100,000,000 |  |  |  | 100,000,000 |  | $ 100,000,000 |  |  |  |  |
Available borrowing capacity |  | $ 50,000,000 |  |  |  | $ 50,000,000 |  | $ 50,000,000 |  |  |  |  |
Effective interest rate |  | 2.50% |  |  |  | 2.50% |  | 2.50% |  |  | 2.50% |  |
3.25% Convertible Senior Notes due in April 2016 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt |  |  |  |  |  |  |  |  |  |  |  |  | $ 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 |  |  |  |  |  |  |  |  |

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