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Statements of Operations and Comprehensive Loss (Parenthetical) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Income Statement [Abstract] |  |  |
Settlement of accounts payable | [1] | $ 588,114 | $ 893,823
[1] | For comparative presentation purposes, settlement of accounts payable of $893,823 for the year ended December 31, 2018 was reclassified out of research and development and into settlement of accounts payable under other income.

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- Definition Settlement of Covance accounts payable. + References No definition available. + Details
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Namespace Prefix: | RTTR_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration