Note 8 - Property, Plant and Equipment (Details) - Property, Plant and Equipment (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Jun. 30, 2012
Property, Plant and Equipment [Line Items]
Cost	$ 176,509	$ 175,649
Accumulated depreciation	(125,309)	(122,052)
Net	51,200	53,597
Land [Member]
Property, Plant and Equipment [Line Items]
Cost	1,377	1,394
Net	1,377	1,394
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	46,101	44,409
Accumulated depreciation	(23,308)	(22,351)
Net	22,793	22,058
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	129,031	129,846
Accumulated depreciation	(102,001)	(99,701)
Net	$ 27,030	$ 30,145