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Note 4 - Leases (Tables)
9 Months Ended
Dec. 31, 2019
Notes Tables  
Operating and Finance Lease Liabilities, Maturity [Table Text Block]
   
Year Ending
   
 
 
 
Operating
 
   
March 31,
 
Finance Leases
   
Leases
 
                     
   
2020 (3 months)
  $
185,871
    $
17,547
 
   
2021
   
528,443
     
71,548
 
   
2022
   
544,296
     
73,939
 
   
2023
   
560,625
     
38,101
 
   
2024
   
577,444
     
3,926
 
   
Thereafter
   
4,375,869
     
-
 
Total undiscounted lease payments
 
 
   
6,772,548
     
205,061
 
Less: Amount representing interest
 
 
   
(3,072,687
)    
(43,925
)
Present value of minimum lease payments
 
 
   
3,699,861
     
161,136
 
Less: Current maturities of lease obligations
 
 
   
(134,239
)    
(47,084
)
Long-term lease obligations
 
 
  $
3,565,622
    $
114,052