Annual report [Section 13 and 15(d), not S-K Item 405]

INCOME TAXES - Narrative (Details)

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INCOME TAXES - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax      
Valuation allowance $ 78,659,000 $ 65,640,000 $ 57,400,000
Capitalized research expenses 9,400,000 5,800,000  
Penalties or interest liabilities accrued 0 0 0
Pretax income 9,600,000 6,500,000 $ 100,000
Foreign subsidiaries' undistributed earnings 18,700,000    
Deferred tax liabilities for undistributed foreign earnings 200,000 100,000  
Luminescent Systems Canada Inc.      
Income Tax      
Foreign subsidiaries' undistributed earnings 3,000,000 $ 1,900,000  
Federal      
Income Tax      
Operating loss carryforwards 1,100,000    
Operating loss carryforwards, subject to expiration 700,000    
Operating loss carryforwards, not subject to expiration 400,000    
State      
Income Tax      
Operating loss carryforwards, subject to expiration 118,900,000    
Operating loss carryforwards, not subject to expiration 13,700,000    
Net operating loss carryforwards 132,600,000    
Tax credit carryforwards 1,100,000    
Foreign Tax Authority      
Income Tax      
Tax credit carryforwards $ 200,000