Post-effective amendment to a registration statement that is not immediately effective upon filing

PROPERTY AND EQUIPMENT, NET (Details)

v3.21.1
PROPERTY AND EQUIPMENT, NET (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment    
Property and equipment, gross $ 26,733,000 $ 24,326,000
Less accumulated depreciation (18,894,000) (16,864,000)
Property and equipment, net 7,839,045 7,461,792
Tooling and equipment    
Property, Plant and Equipment    
Property and equipment, gross 13,465,000 12,351,000
Furniture and other equipment    
Property, Plant and Equipment    
Property and equipment, gross $ 7,379,000 6,111,000
Useful life (in years) 5 years  
Computer software    
Property, Plant and Equipment    
Property and equipment, gross $ 2,378,000 2,291,000
Useful life (in years) 5 years  
Leasehold improvements    
Property, Plant and Equipment    
Property and equipment, gross $ 3,314,000 3,142,000
Equipment under capital lease    
Property, Plant and Equipment    
Property and equipment, gross $ 197,000 $ 431,000
Useful life (in years) 5 years  
Minimum    
Property, Plant and Equipment    
Useful life (in years) 3 years  
Minimum | Tooling and equipment    
Property, Plant and Equipment    
Useful life (in years) 7 years  
Minimum | Leasehold improvements    
Property, Plant and Equipment    
Useful life (in years) 3 years  
Maximum    
Property, Plant and Equipment    
Useful life (in years) 15 years  
Maximum | Tooling and equipment    
Property, Plant and Equipment    
Useful life (in years) 15 years  
Maximum | Leasehold improvements    
Property, Plant and Equipment    
Useful life (in years) 6 years