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Note 17 - Subsequent Events (Details Textual)
12 Months Ended
Jan. 06, 2022
USD ($)
$ / shares
shares
Oct. 19, 2021
USD ($)
ft²
Mar. 15, 2021
USD ($)
ft²
Jan. 06, 2021
USD ($)
$ / shares
shares
Jan. 06, 2020
USD ($)
shares
Dec. 31, 2021
USD ($)
ft²
Dec. 31, 2020
USD ($)
Treasury Stock, Value, Acquired, Cost Method           $ 238,737 $ 280,269
Office Space, Executive Offices and Operations [Member] | San Antonio, TX [Member]              
Operating Leases, Area Leased (Square Foot) | ft²   6,628 2,734        
Operating Lease, Annual Expense     $ 34,125        
Office Space, Executive Offices and Operations [Member] | San Antonio, TX [Member] | Minimum [Member]              
Operating Lease, Annual Expense   $ 135,874 56,047        
Office Space, Executive Offices and Operations [Member] | San Antonio, TX [Member] | Maximum [Member]              
Operating Leases, Area Leased (Square Foot) | ft²           10,535  
Operating Lease, Annual Expense   $ 145,816 $ 60,148        
Chief Financial Officer [Member]              
Treasury Stock, Shares, Acquired (in shares) | shares       11,860 11,860    
Treasury Stock, Value, Acquired, Cost Method       $ 38,545 $ 20,636    
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares       $ 3.25      
Chief Financial Officer [Member] | Subsequent Event [Member]              
Treasury Stock, Shares, Acquired (in shares) | shares 11,361            
Treasury Stock, Value, Acquired, Cost Method $ 47,930            
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) | $ / shares $ 4.21