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 6 Months Ended
Jun. 26, 2020
Aug. 08, 2019
Dec. 27, 2020
Sep. 27, 2020
Jun. 28, 2020
Mar. 29, 2020
Dec. 29, 2019
Nov. 08, 2018
Debt Disclosure [Line Items]                
Line of credit         $ 33,943   $ 34,701  
Debt Instrument, Unamortized Discount, Total         $ 1,277   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 Agreement and Financing Agreement [Member] | Scenario Forecast [Member]                
Debt Disclosure [Line Items]                
Percentage of reduction in earnings before interest, income taxes, depreciation and amortization     24.00% 34.00%        
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, Remaining Borrowing Capacity         $ 30,875 $ 31,185 21,644  
Line of Credit Facility, Maximum Borrowing Capacity             65,000  
Line of credit         33,943   34,701  
TCW Asset Management Company, LLC [Member]                
Debt Disclosure [Line Items]                
Debt Issuance Cost, Gross, Noncurrent         2,070   2,286  
Debt Instrument, Unamortized Discount, Total         $ 1,277   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      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)               $ 0.01
Warrants and Rights Outstanding         $ 1,612   $ 1,730 $ 1,898
Share Price (in dollars per share)         $ 3.15   $ 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      
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%      
Additional Prepayment Fee After Closing Date, Percent, Year Two         2.00%      
Additional Prepayment Fee After Closing Date, Percent, Year Three         1.00%      
TCW Asset Management Company, LLC [Member] | Term Loan A [Member]                
Debt Disclosure [Line Items]                
Maturity date         Nov. 08, 2023      
Line of credit         $ 38,125   $ 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%