Goodwill, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
May 31, 2019	May 31, 2018	May 31, 2017
Goodwill impairment	$ 5,245	$ 0	$ 1,682

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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