Organization and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2020
Shop Equipment And Machinery [Member]
Estimated life	5 years
Leasehold Improvements [Member]
Estimated useful life	Shorter of the lease term or estimated useful life
Office Equipment [Member]
Estimated life	5 years
Software [Member]
Estimated life	5 years
Minimum [Member] | Production Tooling, Jigs, Fixtures [Member]
Estimated life	3 years
Minimum [Member] | Vehicles [Member]
Estimated life	3 years
Maximum [Member] | Production Tooling, Jigs, Fixtures [Member]
Estimated life	5 years
Maximum [Member] | Vehicles [Member]
Estimated life	5 years