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Acquisitions - Narrative (Details) - USD ($) $ in Thousands |  |  |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Nov. 18, 2020 | Jun. 30, 2020 | Jun. 15, 2020 | Apr. 17, 2020 | Feb. 24, 2020 | Sep. 27, 2020 | Sep. 26, 2021
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] |  |  |  |  |  |  |
Cash paid |  | $ 34,900 | $ 35,000 |  |  |  |
Business combination, provisional information, initial accounting incomplete, adjustment, consideration transferred |  |  | $ 1,400 |  |  |  |
Current liabilities |  | 9,100 |  |  |  |  |
Deferred tax liabilities |  | 1,100 |  |  |  |  |
Revenue |  |  |  |  |  |  | $ 28,700
Operating income |  |  |  |  |  |  | $ 1,000
CPI ASC Signal Division, Inc. | Trade names |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets |  | $ 100 |  |  |  |  |
Useful life |  | 1 year |  |  |  |  |
CPI ASC Signal Division, Inc. | Customer relationships |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets |  | $ 2,000 |  |  |  |  |
Useful life |  | 5 years |  |  |  |  |
CPI ASC Signal Division, Inc. | Developed technology and technical know-how |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets |  | $ 2,200 |  |  |  |  |
Useful life |  | 7 years |  |  |  |  |
5-D Systems, Inc |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash paid | $ 5,000 |  |  |  |  |  |
Aggregate purchase price | $ 10,000 |  |  |  |  |  |
Number of shares issued (in shares) | 250,374 |  |  |  |  |  |
Shares issued | $ 5,000 |  |  |  |  |  |

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