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Stockholders' Deficit (Details Textual) - USD ($) | Dec. 31, 2018 | Jun. 30, 2018
--- | --- | ---
Class of Stock [Line Items] |  |
Exclusivity Payment | $ 1,500,000 | $ 0

X
- Definition Amount represents the value of exclusivity payment. + References No definition available. + Details
Name: | rzlt_ExclusivityPayment
Namespace Prefix: | rzlt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration