Annual report pursuant to Section 13 and 15(d)

Income Tax - Additional Information (Detail)

v3.8.0.1
Income Tax - Additional Information (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Jan. 01, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Taxes Additional Information [Line Items]                        
Income tax (expense) benefit   $ (766,000) $ (5,000) $ (83,000) $ (32,000) $ (18,000) $ (41,000) $ (36,000) $ (47,000) $ (885,000) $ (141,000) $ (118,000)
Effective income tax rate reconciliation, at federal statutory income tax rate, Percent                   35.00% 35.00% 35.00%
Net deferred tax liabilities   1,000,000               $ 1,000,000    
Unused NOLs   115,000,000               115,000,000    
Deferred tax assets, operating loss carryforwards, subject to expiration   10,000,000               $ 10,000,000    
Operating loss carryforward expiration period                   2034    
Income tax examination, description                   We have no examinations in progress, none are expected at this time, and years 2013 through 2016 are open.    
Uncertain tax positions   0       0       $ 0 $ 0  
Accrued interest and penalties   0       0       0 0  
Interest and penalties recognized during the period                   $ 0 $ 0 $ 0
Effective income tax rate reconciliation, deduction                   100.00% 100.00%  
Effective income tax rare reconciliation, gain from sale of U.S. real property interests                   35.00%    
Limitation on interest deductions                   (i) the taxpayer’s business interest income for the taxable year, and (ii) 30% of the taxpayer’s “adjusted taxable income” for the taxable year    
Maximum [Member]                        
Income Taxes Additional Information [Line Items]                        
Effective income tax rate reconciliation, at federal statutory income tax rate, Percent                   35.00%    
Ordinary Income [Member]                        
Income Taxes Additional Information [Line Items]                        
Effective income tax rate reconciliation, at federal statutory income tax rate, Percent                   39.60%    
Effective income tax rate reconciliation, dividend deduction                   15.00% 0.00%  
Subsequent Event [Member]                        
Income Taxes Additional Information [Line Items]                        
Effective income tax rare reconciliation, gain from sale of U.S. real property interests 21.00%                      
Limitation in deduction percentage of taxable income to net operating loss prior to dividend paid deduction 80.00%                      
Subsequent Event [Member] | Maximum [Member]                        
Income Taxes Additional Information [Line Items]                        
Effective income tax rate reconciliation, at federal statutory income tax rate, Percent 21.00%                      
Effective income tax rate reconciliation, dividend deduction 20.00%                      
Effective income tax rate reconciliation, deduction 29.60%                      
Subsequent Event [Member] | Ordinary Income [Member]                        
Income Taxes Additional Information [Line Items]                        
Effective income tax rate reconciliation, at federal statutory income tax rate, Percent 37.00%                      
TRS [Member]                        
Income Taxes Additional Information [Line Items]                        
Income tax (expense) benefit                   $ 1,000,000 $ 0 $ 0
Effective income tax rate reconciliation, at federal statutory income tax rate, Percent                   35.00%    
Net deferred tax liabilities   $ 1,000,000       $ 0       $ 1,000,000 $ 0  
TRS [Member] | Subsequent Event [Member]                        
Income Taxes Additional Information [Line Items]                        
Effective income tax rate reconciliation, at federal statutory income tax rate, Percent 21.00%