Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment - Components of Property and Equipment (Detail)

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Property and Equipment - Components of Property and Equipment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Gross property and equipment $ 20,206 $ 15,636
Less accumulated depreciation (1,439) (1,283)
Property and equipment, net 18,767 14,353
Land [Member]    
Property, Plant and Equipment [Line Items]    
Gross property and equipment 5,690 5,690
Buildings and Other Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Gross property and equipment 4,414 4,414
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Gross property and equipment 169 169
Office Furniture and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Gross property and equipment 1,925 1,672
Computer Equipment and Software [Member]    
Property, Plant and Equipment [Line Items]    
Gross property and equipment 20 20
Asset Under Construction [Member]    
Property, Plant and Equipment [Line Items]    
Gross property and equipment $ 7,988 $ 3,671