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Income Taxes (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Deferred tax assets:        
Tax intangibles basis greater than book basis $ 957 $ 1,227    
Allowance for doubtful accounts 20 30    
Unearned income 54 92    
Unfavorable management contract liability 0 28    
Federal and state net operating losses 13,911 22,866    
Other 28 80    
Accrued expenses 336 349    
Tax property basis greater than book basis 1,381 4,117    
Prepaid expenses (2,379) (2,320)    
Net deferred tax asset 14,308 26,469    
Valuation allowance (15,422) (26,968) $ (27,022) $ (3,939)
Net deferred liability $ (1,114) $ (499)