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Note 3 - Accounts Receivable, net (Tables)
 3 Months Ended
Jun. 30, 2013
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,
2013
   
March 31,
2013
 
Government
 
$
813,376
   
$
423,165
 
Commercial
   
173,958
     
153,654
 
Less: Allowance for doubtful accounts
   
(17,282
)
   
(18,940
)
   
$
  970,052
   
$
557,879