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Note 3 - Accounts Receivable, net (Tables)
 3 Months Ended
Jun. 30, 2015
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,
2015
   
March 31,
2015
 
Government
 
$
1,680,023
   
$
1,440,378
 
Commercial
   
201,937
     
209,768
 
Less: Allowance for doubtful accounts
   
(24,975
)
   
(24,975
)
   
$
1,856,985
   
$
1,625,171