Capital Stock Transactions (Stock Option Plans) (Narrative) (Details)	12 Months Ended
	Jun. 30, 2018 plan shares	Jun. 30, 2017 shares	Jun. 30, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options reserved for future grants, number	0
Options outstanding, number	367,500	502,000	616,500
Options exercisable, number	367,500	502,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Plans | plan	2
Options reserved for future grants, number	367,500
Vesting period	5 years
Exercise period	10 years