PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands		Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Other Income and Expenses [Abstract]
Restricted cash		$ 4,561	$ 149	$ 147
Prepaid expenses		6,488	6,408
U.S. Grants receivable		0	9,897
Supplies and materials		2,790	3,659
Assets held for sale		0	852
Other		3,357	2,826
Prepaid expenses and other current assets	[1]	$ 17,196	$ 23,791

[1] Includes related party amounts of $2,226 and $1,473 (accounts receivable) and $0 and $9,897 (prepaid expenses and other current assets) as of September 30, 2025, and December 31, 2024, respectively (see Note 14).