| Document and Entity Information | Oct. 01, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 1, 2021 |
| Entity Registrant Name | U.S. NeuroSurgical Holdings, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-26575 |
| Entity Tax Identification Number | 52-1842411 |
| Entity Address, Address Line One | 2400 Research Blvd, |
| Entity Address, Address Line Two | 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001089815 |
