GENERAL AND BASIS OF PRESENTATION - Concentration of credit risk (Details) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 31, 2024 USD ($)	Sep. 30, 2023	Sep. 30, 2024 USD ($) financialInstitution	Dec. 31, 2023 USD ($) financialInstitution
Concentration Risk [Line Items]
Cash, FDIC insured amount			$ 24,500	$ 43,200
Number of financial Institutions, cash investment | financialInstitution			10	10
Cash, uninsured amount			$ 51,900	$ 57,500
Trade less allowance for credit losses of $210 and $90 respectively (primarily related to VIEs)			153,074	208,704
Total Receivables | Customer Concentration Risk
Concentration Risk [Line Items]
Financing receivable, after allowance for credit loss			$ 102,000	161,000
Primary Customers | Accounts Receivable | Customer Concentration Risk
Concentration Risk [Line Items]
Concentration risk (in percentage)		57.00%	54.00%
Kenya Power and Lighting Co LTD
Concentration Risk [Line Items]
Accounts receivable, past due			$ 29,800
Kenya Power and Lighting Co LTD | Subsequent Event
Concentration Risk [Line Items]
Proceeds over due accounts receivable	$ 7,800
ENEE
Concentration Risk [Line Items]
Accounts receivable, past due			24,200
ENEE | Subsequent Event
Concentration Risk [Line Items]
Proceeds over due accounts receivable	$ 1,100
Non-US
Concentration Risk [Line Items]
Trade less allowance for credit losses of $210 and $90 respectively (primarily related to VIEs)			$ 102,300	$ 152,200