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Related Party Transactions (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 24, 2021 | Sep. 25, 2020 | Sep. 24, 2021 | Sep. 25, 2020 | Mar. 26, 2021 | Jun. 30, 2018 | May 31, 2018
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Total net sales |  | $ 193,610 | $ 136,649 | $ 381,752 | $ 251,650 |  |  |
Trade accounts receivable from related party |  | 23,720 |  | 23,720 |  | $ 23,634 |  |
Amounts due to related party |  | 3,686 |  | 3,686 |  | 2,353 |  |
Rent expense |  | 1,537 | 1,122 | 2,772 | 2,305 |  |  |
Related Party Revenue |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Total net sales |  | 37,165 | 22,511 | 72,618 | 46,131 |  |  |
Sanken |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Trade accounts receivable from related party |  | 23,720 |  | 23,720 |  | 21,595 |  |
Other accounts receivable from related party |  | 133 |  | $ 133 |  | 198 |  |
Option to terminate, period of notice |  |  |  | 6 months |  |  |  |
Rent expense |  | 56 | 58 | $ 112 | 115 |  |  |
Sanken | Related Party Revenue |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Total net sales |  | 37,165 | 22,511 | 72,618 | 46,131 |  |  |
PSL |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Amounts due to related party |  | 3,688 |  | 3,688 |  | 1,739 |  |
Purchases from related party |  | 13,129 | 9,967 | 26,509 | 21,890 |  |  |
PSL | IC Technology Development Agreement |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Fees received |  | 0 | 0 | 0 | 0 |  |  |
Fees paid |  | 0 | 0 | 0 | 0 |  |  |
PSL | Discrete Technology Development Agreement |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Amounts due to related party |  |  |  |  |  | 614 |  |
PSL | Price Support Payment |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Purchases from related party |  |  | 1,700 |  | 3,500 |  |  |
Sanken Electric Europe Ltd. |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Trade accounts receivable from related party |  | 0 |  | 0 |  | $ 1,272 |  |
Director |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Fees paid |  | $ 66 | $ 90 | $ 122 | $ 180 |  |  |
Monthly fee payable |  |  |  |  |  |  | $ 19 | $ 30
Signing fee | $ 54 |  |  |  |  |  |  |
Severance payment if terminated | $ 180 |  |  |  |  |  |  |
Accelerated vesting, acceleration period | 6 months |  |  |  |  |  |  |
Director | Common Class L |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Shares granted (in shares) | 12,000,000 |  |  |  |  |  |  |

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