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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Certain Risks and Concentrations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Concentration Risk [Line Items]
Prepayments to vendors	$ 20		$ 20		$ 356
Three Customers | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage	74.00%
Three Customers | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage			98.00%		88.00%
Distributor to the U.S. Navy | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage	13.00%		18.00%
Distributor to the U.S. Navy | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage			13.00%		52.00%
Two Customers | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage	61.00%	54.00%		40.00%
Four Customers | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage			76.00%
Commercial Customer Accounts | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage			46.00%
Shipbuilder for U.S. Navy | Revenue | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage			12.00%
Shipbuilder for U.S. Navy | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage			18.00%		15.00%
One Customer | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage			67.00%
Distributor to the U.S. Department of Defense Accounted | Accounts receivable | Customer concentration risk
Concentration Risk [Line Items]
Concentration risk, percentage					21.00%

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