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Income Taxes (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 31, 2016 | Mar. 28, 2020 | Mar. 30, 2019 | Mar. 28, 2020 | Mar. 30, 2019 | Sep. 30, 2019
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Effective income tax rate |  | 55.00% | (30.00%) | (22.00%) | (73.00%) |
Income before income taxes |  | $ 15,778 | $ (33,420) | $ 34,809 | $ (12,998) |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  |  | 21.00% |  |
Reduction of valuation allowance |  |  |  | $ 21,200 | $ 1,800 |
Unrecognized tax benefits |  | 13,200 |  | 13,200 |  | $ 11,500
Income tax provision upon recognition of unrecognized tax benefit |  | 13,200 |  | 13,200 |  |
Unrecognized tax benefits that would impact valuation allowance |  | 6,300 |  | 6,300 |  |
Potentail reduction in unrecognized tax benefits and accrued interest over next 12 months |  | $ (500) |  | $ (500) |  |
Additional Exposure [Member] | KOREA, REPUBLIC OF |  |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |  |
Income tax examination, estimate of possible loss | $ 12,000 |  |  |  |  | $ 13,000

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