REVENUE RECOGNITION - Schedule of Revenue Disaggregated by Major Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 53,920	$ 47,959	$ 158,922	$ 115,366
Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	25,249	26,675	80,006	75,329
Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	28,671	21,284	78,916	40,037
Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	17,611	17,933	51,514	51,103
Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	16,231	19,105	53,718	53,342
Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	20,078	10,921	53,690	10,921
Building Solutions
Disaggregation of Revenue [Line Items]
Total revenues	16,347	9,603	42,557	9,603
Building Solutions | Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Building Solutions | Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	16,347	9,603	42,557	9,603
Building Solutions | Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Building Solutions | Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Building Solutions | Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	16,347	9,603	42,557	9,603
Business Services
Disaggregation of Revenue [Line Items]
Total revenues	33,842	37,038	105,232	104,445
Business Services | Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	22,923	25,959	72,601	74,613
Business Services | Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	10,919	11,079	32,631	29,832
Business Services | Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	17,611	17,933	51,514	51,103
Business Services | Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	16,231	19,105	53,718	53,342
Business Services | Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Energy Services
Disaggregation of Revenue [Line Items]
Total revenues	3,731	1,318	11,133	1,318
Energy Services | Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	2,326	716	7,405	716
Energy Services | Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	1,405	602	3,728	602
Energy Services | Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Energy Services | Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Energy Services | Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	$ 3,731	$ 1,318	$ 11,133	$ 1,318