Supplemental Cash Flow Information (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Supplemental Cash Flow Information [Line Items]
Data filed with the United States Environmental Protection Agency	$ 400	$ 2,189
Rising Pharmaceuticals Inc. [Member]
Supplemental Cash Flow Information [Line Items]
Fair market value of shares of common stock issued in acquisition	$ 9,000