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Statutory Reserves - Narrative (Detail) - Subisidiary [Member] - China [Member] $ in Millions	6 Months Ended
	Oct. 31, 2021 USD ($)
Statutory Reserves [Line Items]
Percentage of net income required to be transferred to a statutory surplus reserve fund	10.00%
Maximum required percentage of statutory surplus reserve fund to registered capital	50.00%
Percentage of statutory surplus reserve fund to registered capital	50.00%
Statutory surplus reserve fund balance	$ 4.5
Minimum threshold percentage for statutory surplus reserve fund as percentage of registered capital, below which certain capital transactions are prohibited	25.00%

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- Definition

The maximum percentage of registered capital required to be transferred to a statutory surplus reserve fund under foreign government accounting rules and regulations. Such transfers occur over time based on earnings until the cap is reached, if ever.

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No definition available.

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- Definition

The minimum percentage of the statutory surplus reserve fund balance over registered capital, below which the fund cannot be used to fund previous years' losses, for business expansion, or converted into share capital by (a) issuing new shares to existing shareholders in proportion to their shareholding, or (b) increasing the par value of the shares currently held by them.

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- Definition

The percentage of net income required to be transferred to a statutory surplus reserve fund under foreign accounting rules and regulations.

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No definition available.

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- Definition

Percentage of statutory surplus reserve fund to registered capital.

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Statutory reserves line items.

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- Definition

The amount of the statutory surplus reserve fund balance as of the reporting date. The surplus reserve fund is non-distributable other than during liquidation and can be used to fund previous years' losses, if any, and may be utilized for business expansion or converted into share capital by issuing new shares to existing shareholders in proportion to their shareholding or by increasing the par value of the shares currently held by them provided that the remaining reserve balance after such issue is not less than 25% of the registered capital.

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