v3.26.1
Summary of Significant Accounting Policies and Other Information - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
boardMember
Jun. 30, 2026
USD ($)
segment
boardMember
Dec. 31, 2025
USD ($)
Jun. 30, 2025
USD ($)
Concentration Risk [Line Items]        
Number of board members | boardMember 4 4    
Number of operating segments | segment   1    
Restricted cash $ 4,461 $ 4,461 $ 3,698 $ 3,659
Inventory raw materials provided by customers 2,900 2,900 200  
Tariff refund liability 22,687 22,687 0  
IEEPA Tariff Refund        
Concentration Risk [Line Items]        
Recovery of direct costs 22,700      
Tariff refund liability 22,700 22,700    
Contract With Customer        
Concentration Risk [Line Items]        
Restricted cash $ 1,400 $ 1,400 $ 1,400  
Founders | Power Solutions International, Inc. | Minimum        
Concentration Risk [Line Items]        
Subsidiary, ownership percentage, noncontrolling owner 5.00% 5.00%    
Founders | Power Solutions International, Inc. | Maximum        
Concentration Risk [Line Items]        
Subsidiary, ownership percentage, noncontrolling owner 10.00% 10.00%    
Power Solutions International, Inc. | Weichai America Corp        
Concentration Risk [Line Items]        
Equity method investment, ownership percentage 46.00% 46.00%