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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%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Term of warranty or group of similar warranties, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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