GENERAL AND BASIS OF PRESENTATION - Concentration of credit risk (Details) $ in Thousands	1 Months Ended	6 Months Ended	12 Months Ended
	Jul. 31, 2025 USD ($)	Jun. 30, 2025 USD ($) financialInstitution	Dec. 31, 2024 USD ($) financialInstitution
Concentration Risk [Line Items]
Cash, FDIC insured amount		$ 10,200	$ 31,200
Number of financial Institutions, cash investment | financialInstitution		10	10
Cash, uninsured amount		$ 74,400	$ 73,900
Trade allowance for credit losses		154,277	164,050
Total receivables | Customer Concentration Risk
Concentration Risk [Line Items]
Financing receivable, after allowance for credit loss		$ 83,300	$ 99,700
Primary customers | Accounts receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percentage)		55.00%	57.00%
Kenya Power and Lighting Co. Ltd. ("KPLC")
Concentration Risk [Line Items]
Accounts receivable, past due		$ 36,700
Kenya Power and Lighting Co. Ltd. ("KPLC") | Subsequent Event
Concentration Risk [Line Items]
Proceeds over due accounts receivable	$ 13,900
ENEE
Concentration Risk [Line Items]
Accounts receivable, past due		17,400
ENEE | Subsequent Event
Concentration Risk [Line Items]
Proceeds over due accounts receivable	$ 900
Non-US
Concentration Risk [Line Items]
Trade allowance for credit losses		$ 107,200	$ 105,200