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Note 9 - Operating Leases (Tables)
9 Months Ended
Dec. 31, 2019
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Year ending March 31,
 
2020
  $
26,128
 
2021
   
98,207
 
2022
   
99,725
 
2023
   
4,321
 
Total payments
   
228,381
 
Less: imputed interest
   
(57,615
)
Operating lease liability, total
  $
170,766