Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Details)

v3.20.2
Debt - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Jun. 26, 2020
Aug. 08, 2019
Sep. 26, 2021
Sep. 27, 2020
Sep. 27, 2020
Dec. 29, 2020
Sep. 25, 2020
Dec. 29, 2019
Nov. 08, 2018
Debt Disclosure [Line Items]                  
Line of credit       $ 34,356 $ 34,356     $ 34,701  
Debt Instrument, Unamortized Discount, Total       1,184 1,184     1,464  
PNC and TCW Amendment [Member]                  
Debt Disclosure [Line Items]                  
Non-recurring labor costs and temporary employee bonuses $ 1,200                
Restructuring and severance charges, accruals and reserves 1,000                
Increase in aggregate principal amount of indebtedness $ 3,750                
PNC Fifth Amendment [Member]                  
Debt Disclosure [Line Items]                  
Non-recurring labor costs and temporary employee bonuses         $ 1,500        
Line of Credit Facility, Maximum Borrowing Capacity             $ 2,000    
TCW Sixth Amendment [Member]                  
Debt Disclosure [Line Items]                  
Non-recurring labor costs and temporary employee bonuses       1,500          
PNC Agreement and Financing Agreement [Member] | Scenario Forecast [Member]                  
Debt Disclosure [Line Items]                  
Percentage of reduction in earnings before interest, income taxes, depreciation and amortization     14.00%            
PNC Bank [Member] | Foreign Line of Credit [Member]                  
Debt Disclosure [Line Items]                  
Maturity date         Nov. 08, 2023        
PNC Bank [Member] | Foreign Line of Credit [Member] | Base Rate [Member] | Minimum [Member]                  
Debt Disclosure [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate         0.50%        
PNC Bank [Member] | Foreign Line of Credit [Member] | Base Rate [Member] | Maximum [Member]                  
Debt Disclosure [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate         1.00%        
PNC Bank [Member] | Foreign Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]                  
Debt Disclosure [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate         1.50%        
PNC Bank [Member] | Foreign Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]                  
Debt Disclosure [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate         2.00%        
PNC Bank [Member] | Revolving Credit Facility [Member]                  
Debt Disclosure [Line Items]                  
Line of Credit Facility, Maximum Borrowing Capacity               65,000  
Line of Credit Facility, Remaining Borrowing Capacity       30,464 $ 30,464     21,644  
Line of credit       34,356 34,356     34,701  
PNC Bank [Member] | Revolving Credit Facility [Member] | Scenario Forecast [Member]                  
Debt Disclosure [Line Items]                  
Line of Credit Facility, Remaining Borrowing Capacity           $ 21,644      
TCW Asset Management Company, LLC [Member]                  
Debt Disclosure [Line Items]                  
Debt Issuance Cost, Gross, Noncurrent       1,928 1,928     2,286  
Debt Instrument, Unamortized Discount, Total       $ 1,184 $ 1,184     1,464  
Class of Warrant or Right, Outstanding (in shares)                 504,735
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)       511,949 511,949        
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)                 $ 0.01
Warrants and Rights Outstanding       $ 1,746 $ 1,746     $ 1,730 $ 1,898
Share Price (in dollars per share)       $ 3.41 $ 3.41     $ 3.38  
TCW Asset Management Company, LLC [Member] | Rights Offering and the Registered Direct Offering in June 2019 [Member]                  
Debt Disclosure [Line Items]                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)       7,214 7,214        
TCW Asset Management Company, LLC [Member] | Term Loan [Member]                  
Debt Disclosure [Line Items]                  
Additional Prepayment Fee After Closing Date, Percent, First Twelve Months       3.00% 3.00%        
Additional Prepayment Fee After Closing Date, Percent, Year Two       2.00% 2.00%        
Additional Prepayment Fee After Closing Date, Percent, Year Three       1.00% 1.00%        
TCW Asset Management Company, LLC [Member] | Term Loan A [Member]                  
Debt Disclosure [Line Items]                  
Maturity date         Nov. 08, 2023        
Line of credit       $ 37,813 $ 37,813     $ 38,750  
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Financing Agreement Through June 30, 2020 [Member]                  
Debt Disclosure [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   8.75%              
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Financing Agreement Through June 30, 2020 [Member]                  
Debt Disclosure [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   7.25%              
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Financing Agreement Through June 30, 2020 [Member]                  
Debt Disclosure [Line Items]                  
Debt Instrument, Basis Spread on Variable Rate   8.75%