Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Debt (Details Textual)

v3.8.0.1
Note 5 - Debt (Details Textual) - PNC Bank [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 28, 2018
Apr. 01, 2018
Dec. 31, 2017
Debt Instrument, Face Amount   $ 10,000  
Line of Credit Facility, Periodic Payment   500  
Long-term Line of Credit, Total   7,500 $ 8,000
Revolving Credit Facility [Member]      
Line of Credit Facility, Maximum Borrowing Capacity   30,000  
Line of Credit Facility, Remaining Borrowing Capacity   9,581 5,295
Long-term Line of Credit, Total   10,041 $ 12,191
Equipment Facility [Member]      
Line of Credit Facility, Maximum Borrowing Capacity $ 3,000 3,000  
Maximum Aggregate Loans Advanced for Purchase of Equipment $ 2,000 $ 2,000  
Maximum Percentage of Net Cost of Equipment Purchased 80.00%    
Debt Instrument, Term 3 years    
Base Rate [Member]      
Debt Instrument, Basis Spread on Variable Rate   1.25%  
Base Rate [Member] | Revolving Credit Facility [Member]      
Debt Instrument, Basis Spread on Variable Rate   0.75%  
Base Rate [Member] | Equipment Facility [Member]      
Debt Instrument, Basis Spread on Variable Rate 1.75%