Organization and Business (Details)	12 Months Ended
	Dec. 31, 2018 Center Term	Dec. 23, 2016	Dec. 31, 2010
Medical Oncology Partners LLC [Member]
Equity Method Investments [Abstract]
Equity interest percentage to be acquired by subsidiary	100.00%
Florida Oncology Partners, LLC [Member] | Radiation Therapy Center [Member]
Equity Method Investments [Abstract]
Lease term	10 years
Term of extension period of agreement | Term	3
Extension of agreement	5 years
CB Oncology Partners LLC Member [Member]
Equity Method Investments [Abstract]
Ownership percentage in venture	24.00%
NYU [Member]
Equity Method Investments [Abstract]
Number of gamma knife centers owned | Center	1
USNC [Member] | Medical Oncology Partners LLC [Member]
Equity Method Investments [Abstract]
Ownership percentage in venture		35.83%
USNC [Member] | Florida Oncology Partners, LLC [Member]
Equity Method Investments [Abstract]
Ownership percentage in venture			24.00%
USNC [Member] | CB Oncology Partners LLC Member [Member]
Equity Method Investments [Abstract]
Ownership percentage in venture			24.00%