v3.8.0.1
Income Taxes - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 22, 2017
Dec. 21, 2017
Dec. 30, 2017
Dec. 31, 2016
Dec. 26, 2015
Operating Loss Carryforwards [Line Items]          
Tax Cuts and Jobs Act of 2017, incomplete accounting, change in tax rate, deferred tax liability, Existing Income Tax Benefit     $ 1,700,000    
Tax Cuts and Jobs Act of 2017, income tax benefit     2,300,000    
Income tax expense related to goodwill     3,640,000 $ 4,276,000  
(Benefit from) provision for income taxes     $ (2,506,000) $ 1,282,000 $ 1,221,000
U.S. federal taxes at statutory rate 21.00% 34.00% 34.00% 34.00% 34.00%
Valuation allowance     $ 44,700,000 $ 64,200,000  
Increase in valuation allowance     19,500,000    
Liability for uncertain tax positions     0 0  
Penalties and interest accrued     0 0 $ 0
Federal          
Operating Loss Carryforwards [Line Items]          
(Benefit from) provision for income taxes       $ 1,300,000  
Operating loss carryforwards     131,300,000    
State          
Operating Loss Carryforwards [Line Items]          
Income tax expense related to goodwill     1,500,000    
Operating loss carryforwards     108,800,000    
Germany | Foreign Tax Authority          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards     9,900,000    
United Kingdom | Foreign Tax Authority          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards     2,900,000    
Australia | Foreign Tax Authority          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards     $ 500,000    
Citrus Lane          
Operating Loss Carryforwards [Line Items]          
(Benefit from) provision for income taxes         $ (1,200,000)