The Southern California Regional Gamma Knife Center (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
The Southern California Regional Gamma Knife Center [Abstract]
Renovation installation and operation agreement period			14 years
Due from related parties	$ 105,000		$ 105,000		$ 15,000
SARH gamma knife center reconciliation	0		0		20,000
Condensed Income Statement Information [Abstract]
Patient revenue	0	$ 0	0	$ 0
Net (loss) income	(150,000)	(378,000)	(788,000)	(2,167,000)	(1,572,000)
USNC's equity in (loss) earnings of NeuroPartners LLC and CGK	2,000	(156,000)	(266,000)	(1,287,000)
Condensed Balance Sheet Information [Abstract]
Current assets	579,000		579,000		1,555,000
TOTAL ASSETS	871,000		871,000		1,747,000
Current liabilities	191,000		191,000		280,000
Equity	669,000		669,000		1,456,000	$ 3,028,000
TOTAL LIABILITIES AND EQUITY	871,000		871,000		1,747,000
Neuro Partners LLC and CGK [Member]
The Southern California Regional Gamma Knife Center [Abstract]
Recorded amount of equity method income (loss)			0		0
Condensed Income Statement Information [Abstract]
Patient revenue	241,000	(36,000)	376,000	242,000
Net (loss) income	212,000	(188,000)	136,000	(215,000)
Condensed Balance Sheet Information [Abstract]
Current assets	297,000		297,000		375,000
Noncurrent assets	0		0		42,000
TOTAL ASSETS	297,000		297,000		417,000
Current liabilities	376,000		376,000		632,000
Noncurrent liabilities	0		0		0
Equity	(79,000)		(79,000)		(215,000)
TOTAL LIABILITIES AND EQUITY	297,000		297,000		417,000
SARH center [Member]
The Southern California Regional Gamma Knife Center [Abstract]
SARH gamma knife center reconciliation							$ 90,000	$ 90,000
Expected equipment cost	150,000		150,000
Amount deposited for removal cost	300,000		300,000
Removal cost payable	$ 300,000		$ 300,000
Neuro Partners LLC [Member]
The Southern California Regional Gamma Knife Center [Abstract]
Ownership percentage	20.00%		20.00%
CGK [Member]
The Southern California Regional Gamma Knife Center [Abstract]
Ownership percentage	39.00%		39.00%
CGK [Member] | Related Party [Member]
The Southern California Regional Gamma Knife Center [Abstract]
Due from related parties	$ 0		$ 0		$ 47,000
Neuro Partners LLC and CGK [Member]
Condensed Income Statement Information [Abstract]
USNC's equity in (loss) earnings of NeuroPartners LLC and CGK	$ (27,000)	$ (83,000)	$ (89,000)	$ (110,000)