Document and Entity Information	3 Months Ended
	Mar. 31, 2021 shares
Cover page.
Entity Registrant Name	U.S. NeuroSurgical Holdings, Inc.
Entity Central Index Key	0001089815
Current Fiscal Year End Date	--12-31
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Address, State or Province	MD
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
Entity Common Stock, Shares Outstanding	7,792,185