Note 8 - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Cost	$ 170,518	$ 173,682
Accumulated Depreciation	(131,173)	(132,672)
Net	39,345	41,010
Land [Member]
Cost	1,223	1,314
Accumulated Depreciation
Net	1,223	1,314
Building and Building Improvements [Member]
Cost	44,980	45,486
Accumulated Depreciation	(29,641)	(29,595)
Net	15,339	15,891
Machinery and Equipment [Member]
Cost	124,315	126,882
Accumulated Depreciation	(101,532)	(103,077)
Net	$ 22,783	$ 23,805