REVENUE RECOGNITION - Schedule of Revenue Disaggregated by Major Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 50,061	$ 31,866
Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	26,987
Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	23,074
Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	16,824
Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	18,181
Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	15,056
Building Solutions
Disaggregation of Revenue [Line Items]
Total revenues	11,598
Building Solutions | Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	0
Building Solutions | Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	11,598
Building Solutions | Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	0
Building Solutions | Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	0
Building Solutions | Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	11,598
Business Services
Disaggregation of Revenue [Line Items]
Total revenues	35,005	31,866
Business Services | Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	24,303	23,120
Business Services | Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	10,702	8,746
Business Services | Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	16,824	15,742
Business Services | Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	18,181	$ 16,124
Business Services | Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	0
Energy Services
Disaggregation of Revenue [Line Items]
Total revenues	3,458
Energy Services | Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	2,684
Energy Services | Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	774
Energy Services | Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	0
Energy Services | Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	0
Energy Services | Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	$ 3,458