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Reconciliation of Our Tax Uncertainties (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Income Tax Contingency [Line Items]
Beginning balance	$ 611	$ 598	$ 1,633
Increase/(decrease) related to prior periods	56	(106)	(1,157)
Increase to current period	213	119	122
Ending balance	$ 880	$ 611	$ 598

X

- Definition

Unrecognized Tax Benefits Increase Decrease Resulting From Current Period Tax Positions.

+ References

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- Definition

Unrecognized Tax Benefits Increase Decrease Resulting From Prior Period Tax Positions

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
-URI http://asc.fasb.org/extlink&oid=120406818&loc=SL37586934-109318

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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