Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS - Narrative (Details)

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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2021
Jun. 24, 2021
FAIR VALUE MEASUREMENTS          
Investment in equity securities       $ 20,000,000.0  
Fair value of investments $ 500,000        
Net unrealized loss on equity investment 130,000 $ 402,000      
Other investments in convertible debt instruments 2,000,000.0        
Transfers from Level 1 to Level 2 0 0      
Transfers from Level 2 to Level 1 0 0      
Transfer into Level 3 0 0      
Transfer out of Level 3 0 0      
Interest and other (expense) income, net          
FAIR VALUE MEASUREMENTS          
Net unrealized loss on equity investment 100,000 400,000      
Aerosint          
FAIR VALUE MEASUREMENTS          
Change in fair value of contingent consideration $ 0        
Fair value of contingent consideration         $ 6,100,000
Business Combination, Consideration Transferred [Abstract]          
Amount paid on achievement of technical milestones   $ 800,000      
Value of shares paid on achievement of technical milestones     $ (200,000)    
Current portion of contingent consideration     $ 0