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DEBT (Details) $ in Thousands, ¥ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jan. 31, 2021 USD ($) Tool | Oct. 31, 2020 USD ($) | Jan. 31, 2021 CNY (¥) Tool | Dec. 31, 2020 USD ($)
Debt Instruments [Abstract] |  |  |  |  |
Short-term debt |  | $ 0 | $ 4,708 |  |
Weighted-average interest rate of short -term debt |  |  | 2.02% |  |
Long Term Debt Maturing In Year One [Abstract] |  |  |  |  |
Next 12 months |  | 21,641 | $ 8,970 |  |
Long-term Debt [Abstract] |  |  |  |  |
Months 13 - 24 |  | 21,131 | 15,142 |  |
Months 25 - 36 |  | 20,730 | 13,406 |  |
Months 37 - 48 |  | 28,842 | 9,789 |  |
Months 49 - 60 |  | 9,281 | 9,432 |  |
Thereafter |  | 0 | 7,211 |  |
Long-term debt |  | $ 79,984 | 54,980 |  |
Percent of repayment on approved loan principal in each first five semiannual loan repayments |  | 7.50% |  | 7.50% |
Percent of repayment on approved loan principal in each last five semiannual loan repayments |  | 12.50% |  | 12.50% |
Finance lease amount |  | $ 35,560 | 0 |  |
Xiamen Project Loans [Member] |  |  |  |  |
Long Term Debt Maturing In Year One [Abstract] |  |  |  |  |
Next 12 months |  | 6,961 | 6,705 |  |
Long-term Debt [Abstract] |  |  |  |  |
Months 13 - 24 |  | 10,055 | 7,334 |  |
Months 25 - 36 |  | 10,055 | 9,592 |  |
Months 37 - 48 |  | 10,055 | 9,789 |  |
Months 49 - 60 |  | 9,281 | 9,432 |  |
Thereafter |  | 0 | 7,211 |  |
Long-term debt |  | $ 39,446 | $ 43,358 |  |
Interest rate at balance sheet date |  | 4.90% | 4.90% |  |
Basis spread on interest rates |  | 0.25% | 0.25% |  |
Maturity date |  | Dec. 31, 2025 |  |  |
Periodic payment amount |  | Increases as loans mature |  |  |
Periodic payment frequency |  | Semiannual, on individual loans |  |  |
Loan collateral (carrying amount) |  | $ 95,703 | $ 94,459 |  |
Maximum borrowing capacity |  | 53,400 |  | ¥ 345.0 |
Amount outstanding |  | 46,400 |  | 300.0 |
Xiamen Working Capital Loans [Member] |  |  |  |  |
Long Term Debt Maturing In Year One [Abstract] |  |  |  |  |
Next 12 months |  | 8,861 | 2,265 |  |
Long-term Debt [Abstract] |  |  |  |  |
Months 13 - 24 |  | 990 | 7,808 |  |
Months 25 - 36 |  | 3,465 | 3,814 |  |
Months 37 - 48 |  | 0 | 0 |  |
Months 49 - 60 |  | 0 | 0 |  |
Thereafter |  | 0 | 0 |  |
Long-term debt |  | $ 4,455 | $ 11,622 |  |
Maturity date |  | Jul. 31, 2023 |  |  |
Periodic payment amount |  | Increases as loans mature |  |  |
Periodic payment frequency |  | Semiannual, on individual loans |  |  |
Maximum borrowing capacity |  | $ 25,000 |  |  |
Xiamen Working Capital Loans [Member] | Minimum [Member] |  |  |  |  |
Long-term Debt [Abstract] |  |  |  |  |
Interest rate at balance sheet date |  | 4.53% | 4.53% |  |
Basis spread on interest rates |  | 0.6775% | 0.40% |  |
Xiamen Working Capital Loans [Member] | Maximum [Member] |  |  |  |  |
Long-term Debt [Abstract] |  |  |  |  |
Interest rate at balance sheet date |  | 4.61% | 4.61% |  |
Basis spread on interest rates |  | 0.76% | 0.76% |  |
Xiamen Working Capital Loans (value added tax component) [Member] |  |  |  |  |
Long-term Debt [Abstract] |  |  |  |  |
Maximum borrowing capacity | ¥ |  |  |  | 140.0 |
Amount outstanding under credit facility |  | $ 13,300 |  | 86.1 |
Xiamen Working Capital Loans, Fund Operations [Member] |  |  |  |  |
Long-term Debt [Abstract] |  |  |  |  |
Maximum borrowing capacity | ¥ |  |  |  | 60.0 |
Amount outstanding | ¥ |  |  |  | 0.0 |
Hefei Equipment Loan [Member] |  |  |  |  |
Long Term Debt Maturing In Year One [Abstract] |  |  |  |  |
Next 12 months |  | 0 |  |  |
Long-term Debt [Abstract] |  |  |  |  |
Months 13 - 24 |  | 4,641 |  |  |
Months 25 - 36 |  | 1,701 |  |  |
Months 37 - 48 |  | 0 |  |  |
Months 49 - 60 |  | 0 |  |  |
Thereafter |  | 0 |  |  |
Long-term debt |  | $ 6,342 |  |  |
Interest rate at balance sheet date |  | 4.20% |  |  |
Basis spread on interest rates |  | (0.45%) |  |  |
Maturity date |  | Sep. 30, 2026 |  |  |
Periodic payment amount | [1] | Varies |  |  |
Periodic payment frequency | [2] | Semiannual |  |  |
Loan collateral (carrying amount) |  | $ 89,799 |  |  |
Maximum borrowing capacity |  | $ 30,900 |  | 200.0 |
Amount outstanding | ¥ |  |  |  | ¥ 41.0 |
Number of lithography tools to be purchased | Tool |  | 2 |  | 2 |
Finance Lease [Member] |  |  |  |  |
Long Term Debt Maturing In Year One [Abstract] |  |  |  |  |
Next 12 months |  | $ 5,819 |  |  |
Long-term Debt [Abstract] |  |  |  |  |
Months 13 - 24 |  | 5,445 |  |  |
Months 25 - 36 |  | 5,509 |  |  |
Months 37 - 48 |  | 18,787 |  |  |
Months 49 - 60 |  | 0 |  |  |
Thereafter |  | 0 |  |  |
Long-term debt |  | $ 29,741 |  |  |
Contractual interest rate |  | 1.14% |  | 1.14% |
Maturity date |  | Dec. 31, 2024 |  |  |
Periodic payment amount | [3] | Varies |  |  |
Periodic payment frequency |  | Monthly |  |  |
Loan collateral (carrying amount) | [4] | $ 35,560 |  |  |
Finance lease amount |  |  |  |  | $ 35,600
Short-term obligation |  |  |  |  | $ 3,500
Amended and Restated Credit Agreement [Member] |  |  |  |  |
Long-term Debt [Abstract] |  |  |  |  |
Maximum borrowing capacity |  | 100,000 |  |  |
Amount outstanding under credit facility |  | $ 0 |  |  |
Term of loan |  | 5 years |  |  |
Current borrowing capacity |  | $ 50,000 |  |  |
Cash limit for dividends, distributions and redemption on equity |  | 50,000 |  |  |
Available borrowing capacity |  | $ 50,000 |  |  |
Effective interest rate |  | 1.12% |  | 1.12% |
[1] | First five loan repayments will each be for 7.5 percent of the approved 200 million RMB loan principal; last five installments will each be for 12.5 percent of the approved loan principal.
[2] | Semiannual repayments commence in March 2022.
[3] | See Note 8 for periodic payment amounts.
[4] | Amount represents the carrying amount of the related right-of-use asset, in which the lessor has a secured interest.

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