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Organization and Business (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
Center
Dec. 31, 2020
USD ($)
Jun. 30, 2020
Sep. 02, 2017
Dec. 23, 2016
Dec. 31, 2011
Dec. 31, 2010
Equity Method Investments [Abstract]              
Cash reserves | $ $ 2,178,000 $ 2,030,000          
Corona Gamma Knife, LLC [Member]              
Equity Method Investments [Abstract]              
Ownership percentage 39.00%            
Neuro Partners LLC [Member]              
Equity Method Investments [Abstract]              
Ownership percentage 20.00%            
Boca Oncology Partners RE, LLC ("BOPRE") [Member]              
Equity Method Investments [Abstract]              
Ownership percentage 22.50%            
Medical Oncology Partners LLC [Member]              
Equity Method Investments [Abstract]              
Equity interest percentage to be acquired by subsidiary 100.00%            
CB Oncology Partners LLC [Member]              
Equity Method Investments [Abstract]              
Ownership percentage     28.58% 24.00%      
NYU [Member]              
Equity Method Investments [Abstract]              
Number of gamma knife centers owned | Center 1            
USNC [Member] | Corona Gamma Knife, LLC [Member]              
Equity Method Investments [Abstract]              
Ownership percentage 39.00%            
USNC [Member] | Neuro Partners LLC [Member]              
Equity Method Investments [Abstract]              
Ownership percentage 20.00%            
USNC [Member] | Florida Oncology Partners, LLC [Member]              
Equity Method Investments [Abstract]              
Ownership percentage             24.00%
USNC [Member] | Boca Oncology Partners RE, LLC ("BOPRE") [Member]              
Equity Method Investments [Abstract]              
Ownership percentage           22.51%  
USNC [Member] | Medical Oncology Partners LLC [Member]              
Equity Method Investments [Abstract]              
Ownership percentage         35.83%    
USNC [Member] | CB Oncology Partners LLC [Member]              
Equity Method Investments [Abstract]              
Ownership percentage     28.58%