Note 1 - Summary Of Significant Accounting Policies (Detail) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Cash, Uninsured Amount (in Dollars)	$ 863,000	$ 1,235,000
Depreciation (in Dollars)	5,174,000	5,288,000	5,294,000
Defined Contribution Plan, Cost Recognized (in Dollars)	960,000	941,000	943,000
Research and Development Expense (in Dollars)	5,511,000	5,162,000	5,148,000
Advertising Expense (in Dollars)	$ 328,000	$ 397,000	$ 281,000
Incremental Common Shares Attributable to Contingently Issuable Shares (in Shares)	316,000	293,000	238,000
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	2 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	20 years