Note 5 - Derivative Instruments (warrants): Reconciliation of Number and Weighted Average Exercise Prices, Derivative Warrants (Details) (Derivative Warrants, USD $)	6 Months Ended
	Jan. 30, 2014	Jan. 30, 2013	Jan. 30, 2012	Jan. 30, 2011	Jan. 30, 2010	Jan. 30, 2009	Jan. 30, 2008	Jan. 30, 2007	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009	Jul. 31, 2008	Jul. 31, 2007
Derivative Warrants
Number Outstanding									2,069,000	13,951,500	11,862,500	9,110,000	7,513,000	5,030,500	2,562,500
Weighted Average Exercise Price, Outstanding									$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ 0.25	$ 0.20
Number Granted			2,089,000	2,752,500	1,597,000	2,482,500	2,468,000	2,562,500
Weighted Average Exercise Price, Granted			$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ 0.30	$ 0.20
Number Expired	2,069,000	11,882,500
Weighted Average Exercise Price, Expired	$ 0.30	$ 0.30