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Selected Financial Statement Data Property and Equipment (Details) - USD ($) $ in Thousands | Feb. 01, 2020 | Apr. 27, 2019
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Land | $ 2,183 | $ 1,738
Buildings | 68,208 | 66,403
Machinery and equipment | 100,627 | 96,486
Office furniture and equipment | 6,160 | 6,195
Computer software and hardware | 53,067 | 55,460
Equipment held for rental | 287 | 287
Demonstration equipment | 8,076 | 7,422
Transportation equipment | 8,060 | 7,715
Property, Plant and Equipment, Gross | 246,668 | 241,706
Less accumulated depreciation | 180,300 | 176,392
Property and equipment, net | $ 66,368 | $ 65,314

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