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INCOME TAXES (Details) - USD ($) $ / shares in Units, $ in Thousands | 2 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2017 | Apr. 28, 2019 | Apr. 29, 2018 | Apr. 28, 2019 | Apr. 29, 2018 | Oct. 29, 2017 | Oct. 31, 2018
Effective Income and Statutory Tax Rate [Abstract] |  |  |  |  |  |  |
Effective tax rate |  | 25.00% | 18.80% | 20.90% | 6.50% |  |
U.S. statutory rate | 35.00% | 21.00% | 23.40% | 21.00% | 23.40% |  |
Unrecognized Tax Benefits [Abstract] |  |  |  |  |  |  |
Unrecognized tax benefits |  | $ 800 |  | $ 800 |  |  | $ 1,900
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract] |  |  |  |  |  |  |
Accrued interest and penalties related to unrecognized tax benefits |  | 100 |  | $ 100 |  |  | 100
Taiwan Agency of the Ministry of Finance [Member] |  |  |  |  |  |  |
Foreign Tax [Abstract] |  |  |  |  |  |  |
Foreign statutory rate |  |  |  | 20.00% |  | 17.00% |
Foreign income tax expense (benefit) |  |  |  | $ (200) |  |  |
Income Tax Holiday [Abstract] |  |  |  |  |  |  |
Term of tax year holidays |  |  |  | 5 years |  |  |
Income tax holiday termination date |  |  |  | December 31, 2019 |  |  |
Dollar effect of income tax holiday |  | $ 300 | $ 700 | $ 1,100 | $ 800 |  |
Per share effect of income tax holiday (in dollars per share) |  |  | $ 0.01 | $ 0.01 | $ 0.01 |  |
Federal Alternate Minimum [Member] |  |  |  |  |  |  |
Tax Credit Carryforward [Abstract] |  |  |  |  |  |  |
Change in valuation allowance |  |  |  | $ 3,900 |  |  |
ASU 2016-16 [Member] |  |  |  |  |  |  |
Adoption of New Accounting Standard [Abstract] |  |  |  |  |  |  |
Cumulative effect of adoption of new accounting principle |  |  |  |  |  |  | $ (1,130)

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