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Income Taxes (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:        
Tax intangibles basis greater than book basis $ 828 $ 957    
Allowance for doubtful accounts 25 20    
Unearned income 225 54    
Unfavorable management contract liability 0 0    
Federal and state net operating losses 13,526 13,911    
Other 101 28    
Accrued expenses 511 336    
Tax property basis greater than book basis 1,320 1,381    
Prepaid expenses (2,360) (2,379)    
Net deferred tax asset 14,176 14,308    
Valuation allowance (14,483) (15,422) $ (26,968) $ (27,022)
Net deferred liability $ (307) $ (1,114)