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Number of performance-based stock options granted.

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Share based compensation threshold trading days.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-Based Compensation and Employee Benefit Plans - Additional Information (Details) $ / shares in Units, $ in Millions			1 Months Ended			3 Months Ended			9 Months Ended		35 Months Ended	37 Months Ended
	Aug. 30, 2019 shares	Aug. 26, 2011	Nov. 29, 2019 StockOption	Mar. 31, 2018 TradingDay StockOption	Jan. 31, 2018 shares	May 29, 2020 USD ($) $ / shares shares	Nov. 29, 2019 USD ($)	May 31, 2019 USD ($) $ / shares	May 29, 2020 USD ($) $ / shares shares	May 31, 2019 USD ($) $ / shares	Aug. 25, 2017	Sep. 23, 2014	Feb. 01, 2019 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Employees maximum contribution for annual eligible compensation under 401(k) plan									60.00%
Contribution made by company under 401(k) plan						$ 0.7		$ 0.6	$ 1.8	$ 1.4
Employee Share Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Ordinary shares reserved for issuance \| shares	540,090					683,184			683,184
Number of shares authorized \| shares					650,000
Fair market value percentage of ordinary share					85.00%
Purchase plan termination period					2028-01
Share issued under purchase plan \| shares	109,910								266,816
Performance Based Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Performance-based stock options granted \| StockOption				2
Share based compensation threshold trading days \| TradingDay				30
Number of performance based stock options cancelled \| StockOption			1
Share-based compensation expense							$ 2.0
Performance-based Restricted Share Award (RSA)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense						$ 0.1			$ 0.1
Performance-based Restricted Share Unit Award (PSU)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Reversal of share-based compensation expense							$ 0.8
2017 Share Incentive Plan (SGH Plan)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Ordinary shares reserved for issuance \| shares	4,803,315					4,753,443			4,753,443				1,500,000
Ordinary shares available for grant \| shares	1,427,339					1,472,199			1,472,199
Weighted average fair value of options granted \| $ / shares						$ 9.76		$ 0	$ 9.89	$ 9.83
Total intrinsic value of employee stock options exercised						$ 0.1		$ 0.3	$ 2.6	$ 6.1
Unrecognized compensation costs related to stock options						13.1			$ 13.1
2017 Share Incentive Plan (SGH Plan) \| Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		4 years
Expiration term											10 years
Unrecognized compensation costs recognition period									2 years 4 months 9 days
2017 Share Incentive Plan (SGH Plan) \| Options \| After August 26, 2011 and Before September 23, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiration term												8 years
2017 Share Incentive Plan (SGH Plan) \| RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		4 years
Expiration term		10 years
2017 Share Incentive Plan (SGH Plan) \| RSAs, RSUs and PSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense						2.9		1.8	$ 7.3	4.9
Unrecognized compensation costs recognition period									2 years 7 months 28 days
Total fair value of shares vested						1.5		$ 1.2	$ 7.4	$ 4.5
Unrecognized compensation costs related to awards						$ 30.9			$ 30.9