REVENUE RECOGNITION - Schedule of Revenue Disaggregated by Major Source (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Revenues, Total	$ 172,159	$ 140,056
Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	102,833
Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	69,326
Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	68,379
Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	71,273
Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	32,507
Building Solutions
Disaggregation of Revenue [Line Items]
Revenues, Total	27,578
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	27,578
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	27,578
Business Services
Disaggregation of Revenue [Line Items]
Revenues, Total	139,652	140,056
Business Services | Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	99,386	103,098
Business Services | Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	40,266	36,958
Business Services | Revenue from RPO Customers
Disaggregation of Revenue [Line Items]
Revenues	68,379	67,993
Business Services | Revenue from Contracting Customers
Disaggregation of Revenue [Line Items]
Revenues	71,273	$ 72,063
Business Services | Revenue from Other Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues	0
Energy Services
Disaggregation of Revenue [Line Items]
Revenues, Total	4,929
Energy Services | Transferred Over Time
Disaggregation of Revenue [Line Items]
Revenues	3,447
Energy Services | Transferred At Point In Time
Disaggregation of Revenue [Line Items]
Revenues	1,482
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	$ 4,929