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Critical Accounting Policies and Estimates - Additional Information (Details) - USD ($) $ in Millions | Nov. 30, 2019 | Jun. 01, 2019
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Accounting Policies [Abstract] |  |
Finished goods | $ 50.3 | $ 47.2
Raw material | 3.8 | 4.2
Work in progress | 2.1 | 1.8
Inventory valuation reserves | $ 4.7 | $ 4.6

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