Annual report pursuant to Section 13 and 15(d)

Note 5 - Debt and Capital Leases (Details Textual)

v3.8.0.1
Note 5 - Debt and Capital Leases (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
May 15, 2017
Dec. 31, 2017
Jan. 01, 2017
Base Rate [Member]      
Debt Instrument, Basis Spread on Variable Rate   0.80%  
PNC Bank [Member]      
Debt Instrument, Face Amount $ 10,000    
Line of Credit Facility, Periodic Payment $ 500    
Long-term Line of Credit   $ 8,000 $ 10,000
PNC Bank [Member] | Revolving Credit Facility [Member]      
Debt, Weighted Average Interest Rate   4.90% 4.20%
Line of Credit Facility, Remaining Borrowing Capacity   $ 5,295 $ 7,377
Line of Credit Facility, Maximum Borrowing Capacity   30,000  
Debt Instrument, Interest Rate, Increase (Decrease) 0.25%    
Long-term Line of Credit   $ 12,191 $ 2,731
PNC Bank [Member] | Base Rate [Member]      
Debt Instrument, Basis Spread on Variable Rate   1.25%  
Debt Instrument, Basis Spread on Variable Rate, If Specified Fixed Charge Coverage Ratio is Maintained 0.75%    
PNC Bank [Member] | Base Rate [Member] | Revolving Credit Facility [Member]      
Debt Instrument, Basis Spread on Variable Rate   0.75%  
Debt Instrument, Basis Spread on Variable Rate, If Specified Fixed Charge Coverage Ratio is Maintained 0.25%