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Acquisition - Additional Information (Details) |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 19, 2020 USD ($) millikelvin | Jul. 30, 2020 USD ($) | Oct. 09, 2019 USD ($) | Dec. 26, 2020 USD ($) | Dec. 28, 2019 USD ($) | Dec. 29, 2018 USD ($) | Oct. 25, 2019 USD ($) | Oct. 09, 2019 EUR (€)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Fair value of purchase consideration |  |  |  | $ 51,880,000 | $ 20,524,000 | $ 0 |  |
Contingent consideration |  |  |  | $ 4,012,000 | $ 5,364,000 |  |  |
FRT Term Loan |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | $ 23,400,000 |
Maximum |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Contingent consideration | € |  |  |  |  |  |  |  | € 10,300,000
High Precision Devices, Inc. |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Percentage of voting interests acquired | 100.00% |  |  |  |  |  |  |
Total acquisition consideration | $ 16,900,000 |  |  |  |  |  |  |
Cash acquired in combination | $ 1,680,000 |  |  |  |  |  |  |
High Precision Devices, Inc. | Minimum |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Sensor markets, operating temperature | millikelvin | 30 |  |  |  |  |  |  |
Baldwin Park |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Total acquisition consideration |  | $ 35,000,000.0 |  |  |  |  |  |
FRT |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Percentage of voting interests acquired |  |  | 100.00% |  |  |  |  | 100.00%
Total acquisition consideration |  |  | $ 26,900,000 |  |  |  |  |
Cash acquired in combination |  |  | 1,687,000 |  |  |  |  |
Fair value of purchase consideration |  |  | 22,200,000 |  |  |  |  |
Contingent consideration |  |  | $ 6,500,000 |  |  |  |  |
Contingent consideration, multiple of EBIT |  |  | 150.00% |  |  |  |  |
FRT | Minimum |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Contingent consideration | € |  |  |  |  |  |  |  | € 0
FRT | Maximum |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Contingent consideration | € |  |  |  |  |  |  |  | € 10,300,000

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