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Major Customers (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
USD ($)
customer
Mar. 31, 2023
USD ($)
Revenue, Major Customer [Line Items]    
Number of major customers | customer 6  
Net sales $ 78,145 $ 99,507
Product    
Revenue, Major Customer [Line Items]    
Net sales 75,831 98,337
Tooling    
Revenue, Major Customer [Line Items]    
Net sales 2,314 1,170
UFP    
Revenue, Major Customer [Line Items]    
Net sales 6,276 10,774
UFP | Product    
Revenue, Major Customer [Line Items]    
Net sales 6,276 10,774
UFP | Tooling    
Revenue, Major Customer [Line Items]    
Net sales 0 0
Navistar    
Revenue, Major Customer [Line Items]    
Net sales 14,590 19,447
Navistar | Product    
Revenue, Major Customer [Line Items]    
Net sales 14,429 19,262
Navistar | Tooling    
Revenue, Major Customer [Line Items]    
Net sales 161 185
Volvo    
Revenue, Major Customer [Line Items]    
Net sales 12,720 15,654
Volvo | Product    
Revenue, Major Customer [Line Items]    
Net sales 12,720 15,609
Volvo | Tooling    
Revenue, Major Customer [Line Items]    
Net sales 0 45
Yamaha    
Revenue, Major Customer [Line Items]    
Net sales 8,582 7,888
Yamaha | Product    
Revenue, Major Customer [Line Items]    
Net sales 8,582 7,888
Yamaha | Tooling    
Revenue, Major Customer [Line Items]    
Net sales 0 0
PACCAR    
Revenue, Major Customer [Line Items]    
Net sales 10,195 10,267
PACCAR | Product    
Revenue, Major Customer [Line Items]    
Net sales 9,949 10,200
PACCAR | Tooling    
Revenue, Major Customer [Line Items]    
Net sales 246 67
BRP    
Revenue, Major Customer [Line Items]    
Net sales 7,671 12,725
BRP | Product    
Revenue, Major Customer [Line Items]    
Net sales 7,557 12,144
BRP | Tooling    
Revenue, Major Customer [Line Items]    
Net sales 114 581
Other Customers    
Revenue, Major Customer [Line Items]    
Net sales 26,693 30,640
Other Customers | Product    
Revenue, Major Customer [Line Items]    
Net sales 16,318 22,460
Other Customers | Tooling    
Revenue, Major Customer [Line Items]    
Net sales $ 1,793 $ 292