Note 1 - Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended			24 Months Ended	12 Months Ended	1 Months Ended			12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2014	Jun. 30, 2014 Leasehold Improvements [Member] Maximum [Member]	Aug. 22, 2014 Scenario, Forecast [Member] Maximum [Member] LSI Saco Technologies [Member]	Aug. 22, 2014 Scenario, Forecast [Member] Minimum [Member] LSI Saco Technologies [Member]	Apr. 30, 2014 CANADA	Jun. 30, 2014 Maximum [Member]	Jun. 30, 2014 Minimum [Member]	Jun. 30, 2014 Foreign Bank Accounts [Member]	Jun. 30, 2013 Foreign Bank Accounts [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Cash, FDIC Insured Amount	$ 250,000			$ 250,000
Cash, Uninsured Amount	12,367,000	11,145,000		12,367,000							741,000	613,000
Property, Plant and Equipment, Useful Life					15 years
Depreciation	5,411,000	4,702,000	5,174,000
Finite-Lived Intangible Asset, Useful Life									20 years	5 years
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset	0			0
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	0			0
Standard Warranty Term									5 years	1 year
Defined Contribution Plan, Cost Recognized	1,961,000	1,932,000	960,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent			2.00%	4.00%
Research and Development Expense	8,226,000	6,480,000	5,511,000
Advertising Expense	322,000	280,000	328,000
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares (in Shares)	462,000	356,000	316,000
Gain (Loss) on Disposition of Stock in Subsidiary						(1,000,000)	(500,000)
Line of Credit Facility, Maximum Borrowing Capacity								$ 5,000,000