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Grant Revenue - Additional Information (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 19, 2022
Sep. 30, 2022
Sep. 30, 2022
Grant [Member]      
Disaggregation of Revenue [Line Items]      
Revenue recognized   $ 73,000 $ 73,000
CPRIT Contract [Member]      
Disaggregation of Revenue [Line Items]      
Maximum grant amount to be received as per grant contract $ 17,600,000    
Grant funding term 3 years    
CPRIT grant funding term, description     The CPRIT Grant is subject to customary CPRIT funding conditions, including, but not limited to, a matching fund requirement (one dollar for every two dollars awarded by CPRIT), revenue sharing obligations upon commercialization of 186RNL based on specific dollar thresholds and tiered low single digit royalty rates until CPRIT receives the aggregate amount of 400% of the proceeds awarded under the CPRIT Grant, and certain reporting requirements.
Contract effective date Aug. 31, 2022    
Contract termination date Aug. 30, 2025    
Percentage of aggregate amount of proceeds awarded under CPRIT grant 400.00%    
Percentage of grant proceeds with interest not exceed annually 5.00%    
CPRIT Contract [Member] | Grant [Member]      
Disaggregation of Revenue [Line Items]      
Revenue recognized   $ 73,000 $ 73,000