Capital Stock (Details) (USD $)	3 Months Ended		9 Months Ended			12 Months Ended		3 Months Ended		9 Months Ended
	Mar. 31, 2013 2001 Director Plan Stock options	Mar. 31, 2012 2001 Director Plan Stock options	Mar. 31, 2013 2001 Director Plan Stock options	Mar. 31, 2012 2001 Director Plan Stock options	Mar. 31, 2013 Compensation Policy for Non-Employee Directors Stock options	Jun. 30, 2012 Compensation Policy for Non-Employee Directors Stock options	Jun. 30, 2011 Compensation Policy for Non-Employee Directors Stock options	Mar. 31, 2013 Compensation Policy for Non-Employee Directors Deferred share units	Mar. 31, 2012 Compensation Policy for Non-Employee Directors Deferred share units	Mar. 31, 2013 Compensation Policy for Non-Employee Directors Deferred share units	Mar. 31, 2012 Compensation Policy for Non-Employee Directors Deferred share units
Stock-based Compensation
Compensation expense	$ 21,000	$ 18,000	$ (4,000)	$ 22,000				$ 98,000	$ 67,000	$ 253,000	$ 236,000
Stock units issued			0	0
Vesting period					1 year					1 year
Grant date fair value					$ 30,000
Stock options granted to directors (in shares)					41,805	33,187	49,688