Note 2 - Property Plant, and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Apr. 30, 2016	May 02, 2015
Land	$ 9,500	$ 9,500
Buildings and improvements	50,856	50,405
Machinery and equipment	162,195	156,702
Total	222,551	216,607
Less accumulated depreciation	(160,619)	(156,425)
Property, plant and equipment – net	$ 61,932	$ 60,182