REVENUE RECOGNITION - Schedule of Revenue Disaggregated by Major Source (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 54,941	$ 35,541	$ 105,002	$ 67,407
Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	27,770		54,757
Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	27,171		50,245
Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	17,079		33,903
Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	19,306		37,487
Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	18,556		33,612
Building Solutions
Disaggregation of Revenue [Line Items]
Total revenues	14,612		26,210
Building Solutions \| Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	0		0
Building Solutions \| Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	14,612		26,210
Building Solutions \| Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	0		0
Building Solutions \| Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	0		0
Building Solutions \| Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	14,612		26,210
Business Services
Disaggregation of Revenue [Line Items]
Total revenues	36,385	35,541	71,390	67,407
Business Services \| Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	25,375	25,535	49,678	48,655
Business Services \| Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	11,010	10,006	21,712	18,752
Business Services \| Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	17,079	17,428	33,903	33,170
Business Services \| Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	19,306	$ 18,113	37,487	$ 34,237
Business Services \| Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	0		0
Energy Services
Disaggregation of Revenue [Line Items]
Total revenues	3,944		7,402
Energy Services \| Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	2,395		5,079
Energy Services \| Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	1,549		2,323
Energy Services \| Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	0		0
Energy Services \| Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	0		0
Energy Services \| Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	$ 3,944		$ 7,402