Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Debt (Details Textual)

v3.20.1
Note 4 - Debt (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Aug. 08, 2019
Mar. 29, 2020
Mar. 31, 2020
Dec. 29, 2019
Nov. 08, 2018
Long-term Line of Credit, Total   $ 33,340   $ 34,701  
Debt Instrument, Unamortized Discount, Total   $ 1,371   1,464  
PNC Bank [Member] | Foreign Line of Credit [Member] | Base Rate [Member] | Minimum [Member]          
Debt Instrument, Basis Spread on Variable Rate   0.50%      
PNC Bank [Member] | Foreign Line of Credit [Member] | Base Rate [Member] | Maximum [Member]          
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 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 Instrument, Basis Spread on Variable Rate   2.00%      
PNC Bank [Member] | Revolving Credit Facility [Member]          
Line of Credit Facility, Remaining Borrowing Capacity   $ 31,185 $ 31,185 21,644  
Line of Credit Facility, Maximum Borrowing Capacity       65,000  
Long-term Line of Credit, Total   33,340   34,701  
TCW Asset Management Company, LLC [Member]          
Debt Issuance Cost, Gross, Noncurrent   2,140   2,286  
Debt Instrument, Unamortized Discount, Total   $ 1,371   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   $ 1,213   $ 1,730 $ 1,898
Share Price (in dollars per share)   $ 2.37   $ 3.38  
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 (in shares)   7,214      
TCW Asset Management Company, LLC [Member] | Term Loan [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%      
TCW Asset Management Company, LLC [Member] | Term Loan A [Member]          
Long-term Line of Credit, Total   $ 38,438   $ 38,750  
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%        
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] | Financing Agreement Through June 30, 2020 [Member]          
Debt Instrument, Basis Spread on Variable Rate 8.75%