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Related Party Transactions (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Apr. 26, 2019 | Dec. 26, 2020 | Dec. 28, 2019
Related Party Transaction |  |  |
Loss on disposal | $ 2.6 |  |
Equity Method | Powersem |  |  |
Related Party Transaction |  |  |
Sales to related party |  | $ 1.5 | $ 0.6
Purchase material/service from related party |  | 2.7 | 3.2
Accounts receivable balance |  | 0.1 | 0.0
Accounts payable balance |  | 0.1 | 0.2
Equity Method | EB Tech |  |  |
Related Party Transaction |  |  |
Sales to related party |  | 0.0 | 0.0
Purchase material/service from related party |  | 0.0 | 0.4
Accounts receivable balance |  | 0.0 | 0.0
Accounts payable balance |  | 0.0 | 0.0
Equity Method | ATEC |  |  |
Related Party Transaction |  |  |
Sales to related party |  | 0.0 | 0.0
Purchase material/service from related party |  | 8.7 | 7.9
Accounts receivable balance |  | 0.0 | 0.0
Accounts payable balance |  | $ 0.2 | $ 0.1
Equity Method | Powersem |  |  |
Related Party Transaction |  |  |
Ownership percentage |  | 45.00% |
Equity Method | EB Tech |  |  |
Related Party Transaction |  |  |
Ownership percentage |  | 19.00% |
Equity Method | ATEC |  |  |
Related Party Transaction |  |  |
Ownership percentage |  | 24.00% |
Equity Method | VTOOL Ltd. and Securepush Ltd. |  |  |
Related Party Transaction |  |  |
Investments |  | $ 0.5 |

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