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v3.23.1

2. Summary of Significant Accounting Policies (Details Narrative) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Cash, FDIC insured amount | $ 250,000 |
RenovoCath [Member] |  |
Payments received from clinical sites | $ 141,000 | $ 233,000

X
- Definition Payments received from clinical sites. + References No definition available. + Details
Name: | RNXT_PaymentsReceivedFromClinicalSites
Namespace Prefix: | RNXT_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation. + References No definition available. + Details
Name: | us-gaap_CashFDICInsuredAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | dei_LegalEntityAxis=RNXT_RenovoCathMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |