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Acquisitions - Narrative (Details) $ in Thousands |  |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended
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Dec. 30, 2021 USD ($) | Dec. 10, 2021 USD ($) | Nov. 18, 2020 USD ($) shares | Jun. 30, 2020 USD ($) | Jun. 15, 2020 USD ($) | Apr. 17, 2020 USD ($) | Feb. 24, 2020 USD ($) | Feb. 27, 2019 USD ($) shares | Sep. 27, 2020 USD ($) | Dec. 26, 2021 USD ($) | Dec. 27, 2020 USD ($) | Dec. 29, 2019 USD ($) shares
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Merger and acquisition related items |  |  |  |  |  |  |  |  |  | $ 1,800 | $ 1,700 | $ 2,300
Cash paid |  | $ 6,300 |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash paid | $ 15,200 |  |  |  |  |  |  |  |  |  |  |
Discount Rate | Income Approach | Level 3 |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  | 0.125 |  |
Royalty Rate | Income Approach | Level 3 |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  | 0.10 |  |
Florida Turbine Technologies, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting Interests acquired |  |  |  |  |  |  |  | 80.10% |  |  |  |
FTT Core, LLC |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting Interests acquired |  |  |  |  |  |  |  | 80.10% |  |  |  |
FTT Inc |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, percentage of voting Interests acquired |  |  |  |  |  |  |  | 80.10% |  |  |  |
Purchase price |  |  |  |  |  |  |  | $ 60,000 |  |  |  |
Payments to acquire businesses, gross, including amounts to be paid |  |  |  |  |  |  |  | 33,000 |  |  |  |
Payment paid at close |  |  |  |  |  |  |  | 17,700 |  |  |  |
Payments to acquire businesses, amount to be paid |  |  |  |  |  |  |  | $ 15,300 |  |  |  |
Payment period |  |  |  |  |  |  |  | 3 years |  |  |  |
Business combination, recognized identifiable assets acquired and liabilities assumed, current liabilities |  |  |  |  |  |  |  | $ 7,500 |  |  |  |
Deferred tax Liabilities, net |  |  |  |  |  |  |  | 7,000 |  |  |  |
Business combination, pro forma information, revenue of acquiree since acquisition date, actual |  |  |  |  |  |  |  |  |  |  |  | 52,500
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual |  |  |  |  |  |  |  |  |  |  |  | 700
Merger and acquisition related items |  |  |  |  |  |  |  |  |  |  |  | $ 1,400
Cash paid |  |  |  |  |  |  |  | 20,700 |  |  |  |
FTT Inc | Customer relationships |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  |  |  |  | $ 19,700 |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  |  |  |  |  | 13 years |  |  |  |
FTT Inc | In orocess research and development |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  |  |  |  | $ 8,500 |  |  |  |
FTT Inc | Contracts and backlog |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  |  |  |  | $ 2,100 |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  |  |  |  |  | 2 years |  |  |  |
FTT Inc | Trade names |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  |  |  |  | $ 500 |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  |  |  |  |  | 2 years |  |  |  |
FTT Inc | Common Stock |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, equity interest issued or issuable, number of shares | shares |  |  |  |  |  |  |  | 1,825,406 |  |  |  | 1,825,406
Business acquisition, equity interest issued or issuable, value assigned |  |  |  |  |  |  |  | $ 27,000 |  |  |  |
Technical Directions, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash paid |  |  |  |  |  |  | $ 10,500 |  |  |  |  |
Working capital adjustments |  |  |  |  |  |  |  |  | $ 300 |  |  |
Optimized Performance Machining, Inc. (OPM) |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash paid |  |  |  |  |  | $ 1,800 |  |  |  |  |  |
Working capital adjustments |  |  |  |  |  |  |  |  | $ 30 |  |  |
CPI ASC Signal Division, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  |  |  | $ 32,900 |  |  |  |  |  |  |
Business combination, recognized identifiable assets acquired and liabilities assumed, current liabilities |  |  |  | $ 9,100 |  |  |  |  |  |  |  |
Deferred tax Liabilities, net |  |  |  | $ 1,100 |  |  |  |  |  |  |  |
Business combination, pro forma information, revenue of acquiree since acquisition date, actual |  |  |  |  |  |  |  |  |  |  | 21,900 |
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual |  |  |  |  |  |  |  |  |  |  | 1,100 |
Merger and acquisition related items |  |  |  |  |  |  |  |  |  |  | $ 1,100 |
Cash paid |  |  |  |  | 34,900 |  |  |  |  |  |  |
Business combination, provisional information, initial accounting incomplete, adjustment, consideration transferred |  |  |  |  | $ 1,400 |  |  |  |  |  |  |
CPI ASC Signal Division, Inc. | Customer relationships |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  | 5 years |  |  |  |  |  |  |  |
Intangible assets |  |  |  | $ 2,000 |  |  |  |  |  |  |  |
CPI ASC Signal Division, Inc. | Trade names |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  | 1 year |  |  |  |  |  |  |  |
Intangible assets |  |  |  | $ 100 |  |  |  |  |  |  |  |
CPI ASC Signal Division, Inc. | Developed technology and technical know-how |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Acquired finite-lived intangible assets, weighted average useful life |  |  |  | 7 years |  |  |  |  |  |  |  |
Intangible assets |  |  |  | $ 2,200 |  |  |  |  |  |  |  |
5-D Systems, Inc |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price |  |  | $ 10,000 |  |  |  |  |  |  |  |  |
Business acquisition, equity interest issued or issuable, number of shares | shares |  |  | 250,374 |  |  |  |  |  |  |  |  |
Business acquisition, equity interest issued or issuable, value assigned |  |  | $ 5,000 |  |  |  |  |  |  |  |  |
Cash paid |  |  | $ 5,000 |  |  |  |  |  |  |  |  |
CTT, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash paid |  | $ 22,000 |  |  |  |  |  |  |  |  |  |

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