Note 10 - Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Details
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 5,452,062	$ 4,639,348
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	(1,557,732)	(1,327,739)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	0	7,738
Permanent difference	(55,498)	(118,722)
Income tax provision	$ 3,838,832	$ 3,200,625