Annual report pursuant to Section 13 and 15(d)

Earnings per share - Additional Information (Detail)

 v2.3.0.11
Earnings per share - Additional Information (Detail)
12 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2009
Earnings Per Share Disclosure [Line Items]      
Number of potentially dilutive stock option and warrants excluded from the calculation earnings per share 77,000 70,000 26,000