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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Operating Loss Carryforwards [Line Items]          
Valuation allowance, deferred tax asset, increase (decrease), amount     $ 2,160    
Deferred tax assets, valuation allowance $ 2,633 $ 473 2,633 $ 473  
Tax Cuts and Jobs Act of 2017, income tax benefit 286 19,304   20,950  
Unrecognized tax benefits, income tax penalties and interest expense     47 65 $ 19
Unrecognized tax benefits, income tax penalties and interest accrued 109 $ 83 109 $ 83  
Continuing Operations          
Operating Loss Carryforwards [Line Items]          
Valuation allowance, deferred tax asset, increase (decrease), amount     36    
Discontinued Operations          
Operating Loss Carryforwards [Line Items]          
Valuation allowance, deferred tax asset, increase (decrease), amount     1,492    
State and Local Jurisdiction          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards 26,936   26,936    
State net operating loss carryforwards 26,936   $ 26,936    
State and Local Jurisdiction | Minimum          
Operating Loss Carryforwards [Line Items]          
Taxable income projection years     3 years    
State and Local Jurisdiction | Maximum          
Operating Loss Carryforwards [Line Items]          
Taxable income projection years     4 years    
Domestic Tax Authority          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards 86,865   $ 86,865    
State net operating loss carryforwards 3,055   3,055    
Operating loss carryforwards, not subject to expiration 83,810   $ 83,810    
Taxable income projection years     3 years    
Circulation          
Operating Loss Carryforwards [Line Items]          
State net operating loss carryforwards 8,600   $ 8,600    
Valuation allowance, deferred tax asset, increase (decrease), amount     632    
State Net Operating Loss, Capital Loss, And Tax Credit Carryforwards          
Operating Loss Carryforwards [Line Items]          
Deferred tax assets, valuation allowance 2,166   2,166    
Stock Compensation And Accrued Liability Deferred Tax Assets          
Operating Loss Carryforwards [Line Items]          
Deferred tax assets, valuation allowance $ 467   $ 467