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FAIR VALUE MEASUREMENTS AND CONCENTRATIONS OF CREDIT RISK - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Total revenue	$ 17,426	$ 14,943	$ 52,255	$ 39,916
One Customer \| Accounts Receivable \| Customer Concentration Risk
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable, gross	3,700		$ 3,700
Concentration risk, percentage			46.00%
One Customer \| Unbilled Receivables \| Customer Concentration Risk
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Concentration risk, percentage			66.00%		78.00%
Unbilled receivables	$ 1,900		$ 1,900		$ 3,200
One Customer \| Revenue Benchmark \| Customer Concentration Risk
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Concentration risk, percentage	32.00%	25.00%	32.00%	33.00%
Total revenue	$ 5,500	$ 3,700	$ 17,000	$ 13,300
Customer One \| Accounts Receivable \| Customer Concentration Risk
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable, gross					$ 4,800
Concentration risk, percentage					48.00%
Customer Two \| Accounts Receivable \| Customer Concentration Risk
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Accounts receivable, gross					$ 1,300
Concentration risk, percentage					13.00%