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Income Taxes - Summary of Net Operating Loss Expiration Periods (Details) $ in Thousands	May 31, 2025 USD ($)
Income Tax Disclosure [Abstract]
2026	$ 1
2027 and beyond	2,113
Unlimited	74,019
Total	$ 76,133

X

- Definition

Operating Loss Carryforwards Expiring In Next Three Years

+ References

No definition available.

+ Details

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Namespace Prefix:	rgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Operating Loss Carryforwards Expiring In Year Four and Beyond

+ References

No definition available.

+ Details

Name:	rgp_OperatingLossCarryforwardsExpiringInYearFourAndBeyond
Namespace Prefix:	rgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Operating Loss Carryforwards Without Expiration Periods

+ References

No definition available.

+ Details

Name:	rgp_OperatingLossCarryforwardsWithoutExpirationPeriods
Namespace Prefix:	rgp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant