Note 4 - Accounts Receivable, net (Details) - Schedule of Accounts, Notes, Loans and Financing Receivable - USD ($)	Jun. 30, 2019	Mar. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for doubtful accounts	$ (7,500)	$ (7,500)
Total	1,575,972	2,196,099
Government Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	1,212,550	1,951,729
Commercial Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 370,922	$ 251,870