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Note 3 - Accounts Receivable, net (Tables)
 3 Months Ended
Jun. 30, 2016
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] The following table sets forth the components of accounts receivable:

 
  
June 30,
2016
    
March 31,
2016
  
Government
  
$
2,108,208
    
$
1,343,477
  
Commercial
    
165,258
      
118,384
  
Less: Allowance for doubtful accounts
    
(7,500
)
    
(7,500
)
 
  
$
2,265,966
    
$
1,454,361