Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Narrative (Details)

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INCOME TAXES - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax      
Capitalized research expenses $ 19,900,000    
Income tax receivable     $ 3,000,000
Penalties or interest liabilities accrued 0 $ 0 0
Pretax income 100,000 (3,300,000) (7,000,000.0)
Foreign subsidiaries' undistributed earnings 11,300,000    
Deferred tax liabilities for undistributed foreign earnings 200,000    
Tax benefit relating to the NOL carryback provisions CARES Act 0 300,000 1,500,000
Luminescent Systems Canada Inc.      
Income Tax      
Foreign subsidiaries' undistributed earnings 3,400,000    
Federal      
Income Tax      
Valuation allowance adjustment 11,900,000 6,000,000 $ 23,300,000
Operating loss carryforwards 3,100,000    
Taxable income 51,500,000    
Operating loss carryforwards, subject to expiration 2,700,000    
Operating loss carryforwards, not subject to expiration 400,000    
Federal | Tax Year 2020      
Income Tax      
Taxable income, utilized net operating losses 25,700,000    
State      
Income Tax      
Net operating loss carryforwards 134,100,000    
Tax credit carryforwards 1,100,000    
Foreign Tax Authority      
Income Tax      
Valuation allowance adjustment 400,000 $ 1,300,000  
Tax credit carryforwards $ 200,000