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

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

No definition available.

Name:	us-gaap_CashFDICInsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant