CONSOLIDATED STATEMENTS OF EQUITY - USD ($)	Common Stock [Member]	Additional Paid-In Capital [Member]	(Accumulated Deficit) Retained Earnings [Member]	U.S. Neurosurgical Holdings, Inc. Stockholders' Equity [Member]	Noncontrolling Interests [Member]	Total
Balance at Dec. 31, 2019	$ 78,000	$ 3,100,000	$ (25,000)	$ 3,153,000	$ 0	$ 3,153,000
Balance (in shares) at Dec. 31, 2019	7,792,185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	$ 0	0	533,000	533,000	0	533,000
Balance at Dec. 31, 2020	$ 78,000	3,100,000	508,000	3,686,000	0	$ 3,686,000
Balance (in shares) at Dec. 31, 2020	7,792,185					7,792,185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income						$ 292,000
Balance at Mar. 31, 2021						3,978,000
Balance at Dec. 31, 2020	$ 78,000	3,100,000	508,000	3,686,000	0	$ 3,686,000
Balance (in shares) at Dec. 31, 2020	7,792,185					7,792,185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income						$ (325,000)
Balance at Jun. 30, 2021						3,361,000
Balance at Dec. 31, 2020	$ 78,000	3,100,000	508,000	3,686,000	0	$ 3,686,000
Balance (in shares) at Dec. 31, 2020	7,792,185					7,792,185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income						$ (677,000)
Balance at Sep. 30, 2021						3,009,000
Balance at Dec. 31, 2020	$ 78,000	3,100,000	508,000	3,686,000	0	$ 3,686,000
Balance (in shares) at Dec. 31, 2020	7,792,185					7,792,185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Sale of subsidiary shares to noncontrolling interests		(229,000)		(229,000)	544,000	$ 315,000
Net (loss) income	$ 0	0	(881,000)	(881,000)	(92,000)	(973,000)
Balance at Dec. 31, 2021	$ 78,000	2,871,000	(373,000)	2,576,000	452,000	$ 3,028,000
Balance (in shares) at Dec. 31, 2021	7,792,185					7,792,185
Balance at Mar. 31, 2021						$ 3,978,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income						(617,000)
Balance at Jun. 30, 2021						3,361,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income						(352,000)
Balance at Sep. 30, 2021						3,009,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income						(296,000)
Balance at Dec. 31, 2021	$ 78,000	$ 2,871,000	$ (373,000)	$ 2,576,000	$ 452,000	$ 3,028,000
Balance (in shares) at Dec. 31, 2021	7,792,185					7,792,185