SEGMENT REPORTING - Capital expenditures (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]
Property, plant and equipment	$ 30,894	$ 16,275	$ 57,865	$ 32,325
Operating Segments | Defense and National Security
Segment Reporting Information [Line Items]
Property, plant and equipment	346	309	984	809
Operating Segments | Space Solutions
Segment Reporting Information [Line Items]
Property, plant and equipment	316	549	720	909
Operating Segments | Starlab Space Stations
Segment Reporting Information [Line Items]
Property, plant and equipment	30,214	15,417	56,108	30,607
Corporate
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 18	$ 0	$ 53	$ 0