Quarterly report pursuant to Section 13 or 15(d)

Debt (Narrative) (Details)

v3.21.2
Debt (Narrative) (Details)
6 Months Ended
Oct. 29, 2020
USD ($)
item
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Aug. 28, 2020
USD ($)
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   $ 2,101,000    
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%    
Letter of Credit [Member]        
Debt Instrument [Line Items]        
Line of credit, maximum borrowing capacity $ 2,000,000      
Minimum [Member] | Line of Credit [Member]        
Debt Instrument [Line Items]        
Ability to obtain letter of credit, number of letters of credit | item 1      
Minimum [Member] | Line of Credit [Member] | LIBOR [Member]        
Debt Instrument [Line Items]        
Line of credit, basis spread on variable rate   0.75%