Note 6 - Income Taxes: Schedule of Provision for Income Tax Expense (Benefit) (Details) - USD ($)	3 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Details
Current Federal Tax Expense (Benefit)	$ 1,520,297	$ 1,141,854
Deferred taxes	21,912	167,355
Income tax provision	$ 1,542,209	$ 1,309,209

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration