Annual report pursuant to Section 13 and 15(d)

Employee Retirement Plan and Deferred Compensation Plan - Additional Information (Details)

v3.19.1
Employee Retirement Plan and Deferred Compensation Plan - Additional Information (Details)
 1 Months Ended 12 Months Ended
Jan. 31, 2010
Dec. 29, 2018
USD ($)
Dec. 30, 2017
USD ($)
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Minimum service period required to cover under plan   1 month  
Employer's match per dollar of participants salary   $ 0.50  
Employer's match percentage of participants salary   6.00%  
Contributions vest in annual installments   3 years  
Discretionary contributions   $ 292,000 $ 286,000
Highly Compensated Employees      
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Participant deferral of base salary, percentage (up to) 90.00%    
Participant deferral of annual earned bonus, percentage (up to) 100    
Deferred compensation plan vested 100.00%    
Employer contribution percentage of eligible participants eligible contribution 50.00%    
Percentage of individual eligible contribution to Deferred Compensation Plan account 2.00%    
Increase (decrease) in deferred compensation, employee contribution   120,000 136,000
Increase (decrease) in deferred compensation, employer contribution   28,000 26,000
Increase (decrease) in deferred compensation earnings   107,000 110,000
Increase (decrease) in deferred compensation, distributions   111,000 281,000
Gain (loss) on change in cash surrender value   46,000 5,000
Other non-current assets | Highly Compensated Employees      
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Deferred compensation plan assets   533,000 579,000
Other non-current liabilities | Highly Compensated Employees      
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Deferred compensation plan associated liabilities   $ 662,000 $ 675,000