Annual report pursuant to Section 13 and 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
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Gross property and equipment $ 15,636 $ 11,726
Less accumulated depreciation (1,283) (732)
Property and equipment, net 14,353 10,994
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 4,304
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 1,672 1,506
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 $ 3,671 $ 37