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Note 9 - Leases (Tables)
3 Months Ended
Jun. 30, 2022
Notes Tables  
Lease, Cost [Table Text Block]
    Quarter Ended June 30, 2022
Operating lease cost $ 42,515
Variable lease cost   31,190
Total $ 73,705
     
Cash paid for amounts included in the measurement of lease liabilities    
Operating cash flows for leases
$ 44,433
Remaining lease term 45 months
Discount rate   3.5
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Year Ending March 31 Operating Leases  
2023   117,304  
2024   159,592  
2025   163,224  
2026   165,947  
Total lease payments   606,067  
Imputed lease interest   (37,687 )
Total lease liabilities $ 568,380