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Summary of Significant Accounting Policies and Estimates - Risk (Details)
12 Months Ended
Dec. 31, 2025
Warranty Costs  
Labor warranty period after servicing of existing MEP system 30 days
Revenue | Customer concentration | Minimum  
Warranty Costs  
Single customer, percentage 12.80%
Receivables | Customer concentration | Minimum  
Warranty Costs  
Single customer, percentage 10.20%