Note 4 - Accounts Receivable, net (Tables)

9 Months Ended

Dec. 31, 2017

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

The following table sets forth the components of accounts receivable:

	December 31, 2017			March 31, 2017
Government	$	1,461,090		$	1,392,482
Commercial		207,167			171,400
Less: Allowance for doubtful accounts		(7,500	)		(7,500	)
	$	1,660,757		$	1,556,382