Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)
Sep. 30, 2019
Mar. 31, 2019
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 2,322,120 $ 1,521,747
Accumulated depreciation and amortization (969,117) (871,394)
Total Property and Equipment 1,353,003 650,353
Tooling [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 1,023,092 937,554
Automobiles and Trailer [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 223,030 167,063
Museum Collection Automobiles [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 422,466
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 264,001 100,233
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 156,711 147,960
Computer Equipment and Software [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 90,729 89,246
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 142,091 $ 79,691