Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property and Equipment (Details)
 9 Months Ended
Sep. 30, 2021
Equipment | Minimum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 2 years
Equipment | Maximum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 20 years
Buildings  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 15 years
Automobiles | Minimum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 2 years
Automobiles | Maximum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 7 years
Furniture and fixtures | Minimum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 3 years
Furniture and fixtures | Maximum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 10 years
Computer equipment  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 3 years
Tooling  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 3 years
Software | Minimum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 2 years
Software | Maximum  
Property, Plant and Equipment [Line Items]  
Property, Plant and Equipment, Useful Life 3 years