LEASES - Future Payments of Lease Yet to Commence (Details) - Corporate Headquarters - USD ($) $ in Thousands	Jun. 30, 2022	Apr. 30, 2022
Future payments under this operating lease agreement
2023	$ 149
2024	614
2025	632
2026	651
2027	670
Thereafter	112
Total lease payments	$ 2,828	$ 2,900

Present value of lessee's discounted obligation for lease payments from operating lease yet to commence.

No definition available.

Name:	rzlt_LesseeOperatingLeaseLeaseNotYetCommencedLiability
Namespace Prefix:	rzlt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

N/a.

+ References

No definition available.

+ Details

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Namespace Prefix:	rzlt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease not yet commenced to be paid in after Fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	rzlt_LesseeOperatingLeaseNotYetCommencedLiabilityToBePaidAfterYearFive
Namespace Prefix:	rzlt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease not yet commenced to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	rzlt_LesseeOperatingLeaseNotYetCommencedLiabilityToBePaidNextTwelveMonths
Namespace Prefix:	rzlt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease not yet commenced to be paid in fifth fiscal year when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	rzlt_LesseeOperatingLeaseNotYetCommencedLiabilityToBePaidYearFive
Namespace Prefix:	rzlt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease not yet commenced to be paid in fourth fiscal year when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	rzlt_LesseeOperatingLeaseNotYetCommencedLiabilityToBePaidYearFour
Namespace Prefix:	rzlt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease not yet commenced to be paid in third fiscal year when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	rzlt_LesseeOperatingLeaseNotYetCommencedLiabilityToBePaidYearThree
Namespace Prefix:	rzlt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease not yet commenced to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	rzlt_LesseeOperatingLeaseNotYetCommencedLiabilityToBePaidYearTwo
Namespace Prefix:	rzlt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: