Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.7.0.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Oct. 08, 2014
Oct. 31, 2016
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Tax Credit Carryforward [Line Items]          
Effective tax rate     24.80% 25.10% (2.00%)
Annual usage limitation     $ 135    
Deferred tax liability as a result of transaction     0 $ 368  
Valuation allowance     46,775 46,196  
Accrued expenses related to income taxes payable     35 12  
Federal          
Tax Credit Carryforward [Line Items]          
Net operating loss carryforwards     75,261    
State          
Tax Credit Carryforward [Line Items]          
Net operating loss carryforwards     83,027    
Whitney Automotive Group (WAG) | Federal          
Tax Credit Carryforward [Line Items]          
Net operating loss carryforwards     2,690    
AutoMD          
Tax Credit Carryforward [Line Items]          
Percentage ownership after issuance of shares 64.10% 67.40%      
Deferred tax liability as a result of transaction     1,335    
AutoMD | Federal          
Tax Credit Carryforward [Line Items]          
Net operating loss carryforwards     7,506    
Common Stock Purchase Agreement | AutoMD          
Tax Credit Carryforward [Line Items]          
Common stock issued (in shares) 7,000,000        
Other non-current liabilities | Foreign Tax Authority          
Tax Credit Carryforward [Line Items]          
Income taxes payable     $ 525 $ 470 $ 409