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Selected Financial Statement Data Property and Equipment (Details) - USD ($) $ in Thousands | Aug. 03, 2019 | Apr. 27, 2019
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Land | $ 1,754 | $ 1,738
Buildings | 66,731 | 66,403
Machinery and equipment | 99,055 | 96,486
Office furniture and equipment | 6,145 | 6,195
Computer software and hardware | 53,611 | 55,460
Equipment held for rental | 287 | 287
Demonstration equipment | 7,172 | 7,422
Transportation equipment | 7,943 | 7,715
Property, Plant and Equipment, Gross | 242,698 | 241,706
Less accumulated depreciation | 175,991 | 176,392
Property and equipment, net | $ 66,707 | $ 65,314

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