Note 2 - Basis of Presentation (Details Textual)	9 Months Ended
	Apr. 30, 2019 USD ($)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification
AOCI Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(103,641)
Retained Earnings [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 103,641