OPERATING LEASES - Future Payments of Lease Yet to Commence (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Apr. 30, 2022
Future payments under this operating lease agreement
Remainder of fiscal year 2023	$ 50
2024	609
2025	627
2026	646
2027	666
Thereafter	224
Total lease payments	$ 2,822
Corporate Headquarters
Future payments under this operating lease agreement
Total lease payments		$ 2,900

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

No definition available.

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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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- Definition

Amount of lessee's undiscounted obligation for lease payment for operating lease not yet commenced to be paid in after fourth 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

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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

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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 having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.

+ References

No definition available.

+ Details

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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:
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Balance Type:
Period Type: