SEGMENT REPORTING - Operating performance (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Total Net Sales	$ 45,674	$ 36,653	$ 80,181	$ 66,869
Total other segment expenses	54,740	44,346	110,603	81,718
Depreciation & amortization	(2,708)	(2,758)	(5,310)	(5,471)
Stock-based compensation	(11,547)	(1,113)	(13,270)	(1,843)
Impairment	0	0	0	0
Finance and interest expense, net	(2,523)	(3,095)	(5,252)	(6,089)
Net loss attributable to noncontrolling interests	(1,683)	(2,729)	(2,674)	(2,858)
Other	(5,457)	(8,784)	(3,937)	(9,743)
Loss before taxes	(32,984)	(26,173)	(60,865)	(40,877)
Operating Segments
Segment Reporting Information [Line Items]
Total Net Sales	46,315	39,129	82,164	70,873
Total other segment expenses	47,786	45,095	87,515	80,703
Adjusted EBITDA	(1,471)	(5,966)	(5,351)	(9,830)
Operating Segments | Defense and National Security
Segment Reporting Information [Line Items]
Total Net Sales	35,191	19,029	58,736	33,730
Total other segment expenses	33,345	18,012	56,778	32,974
Adjusted EBITDA	1,846	1,017	1,958	756
Operating Segments | Space Solutions
Segment Reporting Information [Line Items]
Total Net Sales	11,124	20,100	23,428	37,143
Total other segment expenses	12,472	19,031	25,954	37,197
Adjusted EBITDA	(1,348)	1,069	(2,526)	(54)
Operating Segments | Starlab Space Stations
Segment Reporting Information [Line Items]
Total Net Sales	0	0	0	0
Total other segment expenses	1,969	8,052	4,783	10,532
Adjusted EBITDA	(1,969)	(8,052)	(4,783)	(10,532)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Total Net Sales	(641)	(2,476)	(1,983)	(4,004)
Total other segment expenses	(641)	(2,476)	(1,983)	(4,004)
Adjusted EBITDA	0	(1)	0	(24)
Corporate and other expenses
Segment Reporting Information [Line Items]
Total other segment expenses	7,595
Adjusted EBITDA	$ (7,595)	(1,727)	(25,071)	(5,019)
Corporate and other expenses | Corporate and other expenses
Segment Reporting Information [Line Items]
Total other segment expenses		$ 1,727	$ 25,071	$ 5,019