Note 2 - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jul. 30, 2016	Apr. 30, 2016
Land	$ 9,500	$ 9,500
Buildings and improvements	50,881	50,856
Machinery and equipment	165,414	162,195
Total	225,795	222,551
Less accumulated depreciation	(163,069)	(160,619)
Property, plant and equipment – net	$ 62,726	$ 61,932