Property and Equipment (Summary of Property and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 9,362	$ 2,053
Less: Accumulated depreciation	(4,672)	(1,249)
Total property and equipment, net	4,690	804
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	763	0
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	82	0
Model home furnishings and capitalized sales office costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,218	0
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	427	399
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,692	741
Computers and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	901	903
Vehicles and field trailers
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 279	$ 10