Summary of Significant Accounting Policies, Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2018
Buildings [Member]
Property and Equipment [Abstract]
Useful life	39 years
Furniture and Fixtures [Member] | Minimum [Member]
Property and Equipment [Abstract]
Useful life	5 years
Furniture and Fixtures [Member] | Maximum [Member]
Property and Equipment [Abstract]
Useful life	7 years
Computers and Equipment [Member] | Minimum [Member]
Property and Equipment [Abstract]
Useful life	3 years
Computers and Equipment [Member] | Maximum [Member]
Property and Equipment [Abstract]
Useful life	5 years
Leasehold Improvements [Member]
Property and Equipment [Abstract]
Estimated useful life description	Shorter of estimated useful life or lease term
Scanners [Member]
Property and Equipment [Abstract]
Useful life	3 years
Vehicles [Member] | Minimum [Member]
Property and Equipment [Abstract]
Useful life	3 years
Vehicles [Member] | Maximum [Member]
Property and Equipment [Abstract]
Useful life	5 years