Note 4 - Accounts Receivable, net (Tables)

9 Months Ended

Dec. 31, 2018

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, 2018			March 31, 2018
Government	$	2,208,470		$	998,522
Commercial		70,540			104,027
Less: Allowance for doubtful accounts		(7,500	)		(7,500	)
	$	2,271,510		$	1,095,049