Annual report [Section 13 and 15(d), not S-K Item 405]

Business Acquisitions and Divestitures - Additional Information (Details)

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Business Acquisitions and Divestitures - Additional Information (Details) - USD ($)
 9 Months Ended 12 Months Ended
Dec. 31, 2023
Mar. 31, 2023
Mar. 30, 2023
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Business Acquisition [Line Items]              
Contingent consideration $ 1,465,000     $ 1,465,000 $ 1,614,000 $ 1,465,000  
Goodwill, net 75,587,000     75,587,000 66,305,000 75,587,000 $ 70,633,000
Net proceeds from sale of business         54,249,000 0 $ 0
Goodwill disposed of through sale of business         8,529,000    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Applied Energy Group, Inc              
Business Acquisition [Line Items]              
Net of transaction costs         60,400,000    
Net proceeds from sale of business         54,249,000    
Gain (loss) on disposition of stock in subsidiary         38,007,000    
Sale of stock in subsidiary, transaction costs         2,179,000    
Goodwill disposed of through sale of business         8,529,000    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Applied Energy Group, Inc | Senior Loans              
Business Acquisition [Line Items]              
Repayments of long-term debt         $ 57,000,000    
Enerqos              
Business Acquisition [Line Items]              
Fair value of consideration 13,445,000 $ 13,445,000 $ 13,445,000        
Payments to acquire businesses, gross 9,535,000 9,535,000   9,535,000      
Contingent consideration     0        
Cash acquired from acquisition     353,000        
Long-term debt assumed, net of current portions 3,951,000 3,951,000 3,951,000        
Deferred tax liability 931,000 931,000 931,000 931,000   931,000  
Goodwill, net $ 6,690,000 $ 6,855,000 $ 6,855,000 $ 6,690,000   $ 6,690,000