Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Apr. 15, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity File Number	0-15586
Entity Registrant Name	U.S. NeuroSurgical Holdings, Inc.
Entity Central Index Key	0001089815
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-5370333
Entity Address, Address Line One	2400 Research Blvd, Suite 325
Entity Address, City or Town	Rockville
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	20850
City Area Code	301
Local Phone Number	208-8998
Title of 12(g) Security	Common Stock, par value $.01 per share
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	false
Entity Public Float			$ 1,257,000
Entity Common Stock, Shares Outstanding		7,792,185
Auditor Name	Aronson LLC
Auditor Location	Rockville, Maryland
Auditor Firm ID	517