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Debt and Shareholders' Equity (Details Narrative)
3 Months Ended 9 Months Ended
Oct. 26, 2017
USD ($)
ft²
Sep. 30, 2020
USD ($)
shares
Sep. 30, 2020
USD ($)
shares
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Oct. 26, 2017
a
Long Term Debt And Stockholders Equity [Line Items]            
Outstanding borrowings under revolving loan agreement   $ 30,703,167,000 $ 30,703,167,000   $ 33,240,407,000  
Cash settlement of stock options   $ 245,000 805,000 $ 1,254,000    
Amount paid for shares authorized to be repurchased during the period     $ 287,000      
2010 Stock Repurchase Program            
Long Term Debt And Stockholders Equity [Line Items]            
Shares authorized to be repurchased during period | shares     14,420      
Amount paid for shares authorized to be repurchased during the period     $ 287,000      
Shares that may be purchased under repurchase programs | shares   3,579 3,579      
Additional shares that may be purchased under repurchase programs | shares   200,000 200,000      
HSBC Bank            
Long Term Debt And Stockholders Equity [Line Items]            
Credit facility borrowing capacity   $ 50,000,000 $ 50,000,000      
Credit facility interest rate     Prime Rate less 1.25%      
Credit facility expiration date     May 24, 2023      
Facility fee per annum     20.00%      
HSBC Bank | Prime Rate            
Long Term Debt And Stockholders Equity [Line Items]            
Interest rate     1.25%      
First Aid Only Distribution Center            
Long Term Debt And Stockholders Equity [Line Items]            
Covenant terms and compliance     Under the revolving loan agreement, the Company is required to maintain specific amounts of tangible net worth, a specified debt to net worth ratio and a fixed charge coverage ratio and must have annual net income greater than zero, measured as of the end of each fiscal year. At September 30, 2020, the Company was in compliance with the covenants then in effect under the loan agreement      
Purchase price $ 4,000,000.0          
Area of real estate property 53,000         2.86
Variable rate mortgage interest rate     interest rate of LIBOR plus 2.5%      
Monthly payment $ 22,222          
Mortgage maturity date     October 31, 2024      
First Aid Only Distribution Center | LIBOR Rate            
Long Term Debt And Stockholders Equity [Line Items]            
Interest rate 2.50%