Gamma Knife at NYU Medical Center	3 Months Ended
Mar. 31, 2021
Gamma Knife at NYU Medical Center [Abstract]
Gamma Knife at NYU Medical Center	Note B – Gamma Knife at NYU Medical Center U.S. NeuroSurgical, Inc. (“USN”), a wholly-owned subsidiary of U.S. NeuroSurgical Holdings, Inc., opened its New York gamma knife treatment center in July 1997 on the campus of New York University (“NYU”) Medical Center. USN installed a new Leksell gamma knife, the PERFEXION model, at the NYU Medical Center in March 2009 in replacement of the older gamma knife equipment which it had been leasing to NYU. In connection with this upgrade, USN modified its arrangement with NYU to extend the term for 12 years from March 2009. In October 2012, the Company’s facility at NYU was totally destroyed as a result of flooding from Hurricane Sandy. The gamma knife had to be removed to prevent any cobalt leakage that might occur due to rusting of the equipment. The removal cost was $525,000. The Company paid a lease settlement of the outstanding principal balance only and received from insurance coverage $930,000 above the lease principal payments and removal costs. The Company finalized arrangements with NYU regarding the restoration of the gamma knife center and entered into an amendment to the original Gamma Knife Neuroradiosurgery Equipment Agreement (“NYU Agreement”). The NYU facility was rebuilt and reopened in the Tisch Hospital of NYU Langone Medical Center. The first patient was treated on April 29, 2014. The Company’s contract with NYU, its only customer, ended in March 2021. Upon termination of the NYU contract, the Company recognized a gain of $100,000 relating to previously accrued expenses. This gain was included as a reduction in selling, general and administrative expense in the quarter ended March 31, 2021. The Company is actively seeking new business ventures and believes that its cash reserves, which are in excess of $2 million at March 31, 2021, will allow the Company the opportunity do so. Such plans include possible new operations or extensions of its activities in Florida and California, where it has established working relationships with physician groups, hospitals and other organizations. In addition to these activities, the Company has been exploring possible combinations with other existing businesses that would create a larger operating entity that would better justify the expenses involved in continuing as an independent publicly traded company.

Note B – Gamma Knife at NYU Medical Center

U.S. NeuroSurgical, Inc. (“USN”), a wholly-owned subsidiary of U.S. NeuroSurgical Holdings, Inc., opened its New York gamma knife treatment center in July 1997 on the campus of New York University (“NYU”) Medical Center. USN installed a new Leksell gamma knife, the PERFEXION model, at the NYU Medical Center in March 2009 in replacement of the older gamma knife equipment which it had been leasing to NYU. In connection with this upgrade, USN modified its arrangement with NYU to extend the term for 12 years from March 2009.

In October 2012, the Company’s facility at NYU was totally destroyed as a result of flooding from Hurricane Sandy. The gamma knife had to be removed to prevent any cobalt leakage that might occur due to rusting of the equipment. The removal cost was $525,000. The Company paid a lease settlement of the outstanding principal balance only and received from insurance coverage $930,000 above the lease principal payments and removal costs.

The Company finalized arrangements with NYU regarding the restoration of the gamma knife center and entered into an amendment to the original Gamma Knife Neuroradiosurgery Equipment Agreement (“NYU Agreement”). The NYU facility was rebuilt and reopened in the Tisch Hospital of NYU Langone Medical Center. The first patient was treated on April 29, 2014. The Company’s contract with NYU, its only customer, ended in March 2021. Upon termination of the NYU contract, the Company recognized a gain of $100,000 relating to previously accrued expenses. This gain was included as a reduction in selling, general and administrative expense in the quarter ended March 31, 2021. The Company is actively seeking new business ventures and believes that its cash reserves, which are in excess of $2 million at March 31, 2021, will allow the Company the opportunity do so. Such plans include possible new operations or extensions of its activities in Florida and California, where it has established working relationships with physician groups, hospitals and other organizations. In addition to these activities, the Company has been exploring possible combinations with other existing businesses that would create a larger operating entity that would better justify the expenses involved in continuing as an independent publicly traded company.