Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Narrative (Details)

v3.23.3
Basis of Presentation - Narrative (Details)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Feb. 13, 2019
element
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Sep. 30, 2023
USD ($)
Oct. 01, 2022
USD ($)
Apr. 02, 2022
USD ($)
Sep. 30, 2023
USD ($)
Oct. 01, 2022
USD ($)
Nov. 06, 2023
USD ($)
Dec. 31, 2022
USD ($)
Sep. 30, 2021
USD ($)
Business Acquisition [Line Items]                      
Allowance for doubtful accounts       $ 9.2     $ 9.2     $ 2.6  
Bad debt expense       7.5 $ 0.3   7.7 $ 0.4      
Total write-offs charged against allowance       0.4 0.0   1.2 0.0      
Research and development expense       14.1 $ 12.0   39.5 36.8      
USDOT | AMPJ Award                      
Business Acquisition [Line Items]                      
USDOT grant receivable amount (up to)                     $ 14.7
Portion of grant received           $ 5.2          
Revenue recognized included in contract liability balance               $ 6.0      
Non-Aerospace Contract Manufacturing Customer                      
Business Acquisition [Line Items]                      
Allowance for doubtful accounts       7.5     7.5        
Inventory reserve       3.6     3.6        
Non-Aerospace Contract Manufacturing Customer | Subsequent Event                      
Business Acquisition [Line Items]                      
Allowance for doubtful accounts                 $ 7.5    
Inventory reserve                 $ 3.6    
Test Systems Segment                      
Business Acquisition [Line Items]                      
Severance charges             0.6        
Restructuring       $ 0.1     $ 0.1        
Sold | Semiconductor Test Business | Test Systems Segment                      
Business Acquisition [Line Items]                      
Number of elements for contingent earnouts | element 2                    
Earnout proceeds received   $ 3.4 $ 11.3