Quarterly report pursuant to Section 13 or 15(d)

Debt (Narrative) (Details)

v3.20.2
Debt (Narrative) (Details)
9 Months Ended
Oct. 29, 2020
USD ($)
item
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Line of Credit [Member]      
Debt Instrument [Line Items]      
Line of credit, maximum borrowing capacity   $ 5,000,000  
Line of credit, amount outstanding   0 $ 0
Line of credit, remaining borrowing capacity   $ 3,976,000  
Line of credit facility, interest rate at period end   2.00%  
Line of credit, expiration date   Aug. 28, 2021  
Line of Credit [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
Line of credit, basis spread on variable rate   1.25%  
Minimum [Member] | Line of Credit [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
Line of credit, basis spread on variable rate   0.75%  
Subsequent Event [Member] | Letter of Credit [Member]      
Debt Instrument [Line Items]      
Line of credit, maximum borrowing capacity $ 2,000,000    
Subsequent Event [Member] | Minimum [Member] | Line of Credit [Member]      
Debt Instrument [Line Items]      
Number of letters of credit | item 1