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

SUMMARY OF SIGNIFICANT ACCOUNTING PRINCIPLES AND PRACTICES - Narrative (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING PRINCIPLES AND PRACTICES - Narrative (Details)
 1 Months Ended 12 Months Ended
Oct. 31, 2024
USD ($)
Dec. 31, 2025
USD ($)
segment
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Nov. 30, 2023
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Number of reportable segments | segment   2      
Research and development, design and related engineering   $ 43,475,000 $ 52,086,000 $ 53,736,000  
Cash and cash equivalents maturity period (in months)   3 months      
Allowance for doubtful accounts balance   $ 847,000 2,377,000 9,193,000  
Reserve for inventory valuation   48,700,000 43,300,000    
Capitalized computer software, gross   2,800,000 0    
Depreciation expense   10,200,000 11,500,000 12,200,000  
Impairment charge   0 0 0  
Intangible asset impairment charge   0 0 0  
Income associated with reversal of liability related to equity investment       1,800,000  
Valuation allowance   74,451,000 78,659,000 65,600,000  
Cash dividends paid   0 0 $ 0  
Cost Of Product And Service Sold          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Restructuring charges   $ 5,800,000      
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]   Cost of Products Sold      
Selling, General and Administrative Expenses          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Restructuring charges   $ 400,000      
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]   Selling, General and Administrative Expenses      
Convertible Debt | Convertible Senior Notes Due 2030          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Convertible debt, fair value   $ 84,800,000 176,900,000    
Building | Minimum          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Property, plant and equipment, useful life (in years)   25 years      
Building | Maximum          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Property, plant and equipment, useful life (in years)   40 years      
Machinery and Equipment | Minimum          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Property, plant and equipment, useful life (in years)   4 years      
Machinery and Equipment | Maximum          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Property, plant and equipment, useful life (in years)   10 years      
Aerospace Customer          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Allowance for doubtful accounts balance $ 1,000,000.0 $ 1,000,000.0 $ 7,500,000    
Reserve for inventory valuation 1,700,000        
Impairment of fixed assets $ 600,000        
Non-Core Aerospace Contract Manufacturing Customer          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Allowance for doubtful accounts balance         $ 7,500,000
Inventory adjustments         $ 3,600,000