Note 8 - Pension Plans: Schedule of Expected Benefit Payments (Details) (USD $)	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Defined Benefit Plan, Expected Future Benefit Payments in Year One						$ 729
Defined Benefit Plan, Expected Future Benefit Payments in Year Two					3,311
Defined Benefit Plan, Expected Future Benefit Payments in Year Three				999
Defined Benefit Plan, Expected Future Benefit Payments in Year Four			1,282
Defined Benefit Plan, Expected Future Benefit Payments in Year Five		1,400
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	$ 18,655