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Note 9 - Subsequent Events (Details Textual) - USD ($)
3 Months Ended
Apr. 16, 2021
Apr. 07, 2021
Mar. 31, 2021
Mar. 31, 2020
Business Combination, Acquisition Related Costs     $ 70,530
Tellenger, Inc. [Member]        
Business Combination, Acquisition Related Costs     $ 70,530  
Subsequent Event [Member] | Summit Community Bank [Member] | Revolving Credit Facility [Member]        
Debt Instrument, Interest Rate, Stated Percentage 3.25%      
Line of Credit Facility, Maximum Borrowing Capacity $ 1,000,000      
Debt Instrument, Interest Rate, Effective Percentage 3.25%      
Subsequent Event [Member] | Term Loan [Member] | Summit Community Bank [Member]        
Debt Instrument, Face Amount $ 1,000,000      
Debt Instrument, Term (Year) 2 years      
Debt Instrument, Interest Rate, Stated Percentage 4.89%      
Subsequent Event [Member] | Tellenger, Inc. [Member]        
Payments to Acquire Businesses, Gross   $ 2,300,000    
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)   68,264    
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable   $ 200,000