Note 6 - Warrants (Details) - shares	Nov. 30, 2017	May 31, 2014	May 31, 2013	May 31, 2012	May 31, 2011	May 31, 2010	May 31, 2008
Details
Common stock purchase warrants outstanding	0	0	50,000	70,252	80,252	40,252	10,000

Represents the Common stock purchase warrants outstanding (number of shares), during the indicated time period.

No definition available.

Name:	fil_CommonStockPurchaseWarrantsOutstanding
Namespace Prefix:	fil_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration