Annual report pursuant to Section 13 and 15(d)

Note 5 - Debt and Finance Leases (Details Textual)

v3.20.1
Note 5 - Debt and Finance Leases (Details Textual)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended 40 Months Ended
Sep. 27, 2019
USD ($)
Aug. 08, 2019
USD ($)
Jul. 03, 2019
USD ($)
Sep. 29, 2019
Dec. 29, 2019
USD ($)
$ / shares
shares
Dec. 30, 2018
USD ($)
$ / shares
Dec. 31, 2017
USD ($)
Nov. 08, 2023
Mar. 29, 2019
Mar. 28, 2019
Nov. 08, 2018
USD ($)
$ / shares
shares
Long-term Line of Credit, Total         $ 34,701 $ 25,020          
Debt Instrument, Unamortized Discount, Total         1,464 1,843          
Amortization of Debt Issuance Costs         1,592 194 $ 27        
Lessee, Operating Lease, Option to Extend Amount         1,522            
Lessee, Finance Lease, Option to Extend Amount         $ 6,456            
Minimum [Member]                      
Lessee, Operating Lease, Renewal Term         1 year            
Maximum [Member]                      
Lessee, Operating Lease, Renewal Term         5 years            
PNC Bank [Member] | Revolving Credit Facility [Member]                      
Line of Credit Facility, Maximum Borrowing Capacity   $ 65,000     $ 65,000            
Debt Instrument, Covenant, Maximum Restructuring Costs $ 2,300                    
Debt Instrument, Covenant, Maximum Write-offs of Accounts Receivable 1,623                    
Debt Instrument, Covenant, Maximum Write-offs of Inventory 1,607                    
Debt Instrument, Covenant, Maximum Investments Under Restructuring 2,300                    
Long-term Line of Credit, Total         34,701 25,020          
Line of Credit Facility, Remaining Borrowing Capacity         $ 21,644 13,974          
PNC Bank [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]                      
Debt Instrument, Basis Spread on Variable Rate         0.75%            
PNC Bank [Member] | Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]                      
Debt Instrument, Basis Spread on Variable Rate         1.25%            
PNC Bank [Member] | Revolving Credit Facility [Member] | One, Two, or Three Month Fully Absorbed PNC LIBOR Rate [Member] | Minimum [Member]                      
Debt Instrument, Basis Spread on Variable Rate         2.50%            
PNC Bank [Member] | Revolving Credit Facility [Member] | One, Two, or Three Month Fully Absorbed PNC LIBOR Rate [Member] | Maximum [Member]                      
Debt Instrument, Basis Spread on Variable Rate         3.00%            
PNC Bank [Member] | Foreign Line of Credit [Member]                      
Line of Credit Facility, Maximum Borrowing Capacity   15,000                  
Line of Credit Facility, Maximum Borrowing Capacity, Increased   $ 20,000                  
PNC Bank [Member] | Foreign Line of Credit [Member] | Base Rate [Member] | Minimum [Member]                      
Debt Instrument, Basis Spread on Variable Rate   0.75%                  
PNC Bank [Member] | Foreign Line of Credit [Member] | Base Rate [Member] | Maximum [Member]                      
Debt Instrument, Basis Spread on Variable Rate   1.25%                  
PNC Bank [Member] | Foreign Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]                      
Debt Instrument, Basis Spread on Variable Rate   2.50%                  
PNC Bank [Member] | Foreign Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]                      
Debt Instrument, Basis Spread on Variable Rate   3.00%                  
TCW Asset Management Company, LLC [Member]                      
Debt Issuance Cost, Gross, Noncurrent         $ 2,286 2,750          
Debt Instrument, Unamortized Discount, Total         $ 1,464 1,843          
Class of Warrant or Right, Outstanding | shares         504,735           504,735
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares         511,949            
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares                     $ 0.01
Warrants and Rights Outstanding         $ 1,730 $ 2,009         $ 1,898
Share Price | $ / shares         $ 3.38 $ 3.98          
TCW Asset Management Company, LLC [Member] | Rights Offering and the Registered Direct Offering in June 2019 [Member]                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares         7,214            
TCW Asset Management Company, LLC [Member] | Term Loan A [Member]                      
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%            
Debt Instrument, Leverage Ratio Required                 3.75 3.5  
Repayments of Debt   $ 10,000 $ 12,022                
Maximum Paydown of Debt Instrument, Permit   $ 10,000                  
Long-term Line of Credit, Total         $ 38,750 $ 50,000          
Amortization of Debt Issuance Costs         1,250            
TCW Asset Management Company, LLC [Member] | Financing Agreement Through June 30, 2020 [Member]                      
Debt Instrument, Covenant, Maximum Restructuring Costs 2,300                    
Debt Instrument, Covenant, Maximum Write-offs of Accounts Receivable 1,623                    
Debt Instrument, Covenant, Maximum Write-offs of Inventory 1,607                    
Debt Instrument, Covenant, Maximum Investments Under Restructuring $ 2,300                    
TCW Asset Management Company, LLC [Member] | Term Loan B [Member]                      
Long-term Line of Credit, Total         $ 0 $ 12,000          
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Term Loan A [Member]                      
Debt Instrument, Basis Spread on Variable Rate       8.75%              
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Financing Agreement Through June 30, 2020 [Member]                      
Debt Instrument, Basis Spread on Variable Rate   8.75%     8.75%            
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Term Loan A [Member]                      
Debt Instrument, Basis Spread on Variable Rate         7.25%            
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Term Loan A [Member] | Forecast [Member]                      
Debt Instrument, Basis Spread on Variable Rate               7.25%      
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Financing Agreement Through June 30, 2020 [Member]                      
Debt Instrument, Basis Spread on Variable Rate   7.25%                  
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Term Loan A [Member]                      
Debt Instrument, Basis Spread on Variable Rate         8.75%            
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Term Loan A [Member] | Forecast [Member]                      
Debt Instrument, Basis Spread on Variable Rate               8.75%      
TCW Asset Management Company, LLC [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Financing Agreement Through June 30, 2020 [Member]                      
Debt Instrument, Basis Spread on Variable Rate   8.75%