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Note 1 - Business and Basis of Presentation | 12 Months Ended
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Dec. 31, 2022
Notes to Financial Statements |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] | NOTE 1 – BUSINESS AND BASIS OF PRESENTATION Business – These consolidated financial statements include the accounts of American Shared Hospital Services (“ASHS”) and its subsidiaries (the “Company”) as follows: ASHS wholly-owns the subsidiaries American Shared Radiosurgery Services (“ASRS”), PBRT Orlando, LLC (“Orlando”), OR21, Inc., and MedLeader.com, Inc. (“MedLeader”); ASHS is the majority owner of Long Beach Equipment, LLC (“LBE”); ASRS is the majority-owner of GK Financing, LLC (“GKF”) which wholly-owns the subsidiary Instituto de Gamma Knife del Pacifico S.A.C. (“GKPeru”). GKF is the majority owner of the subsidiaries Albuquerque GK Equipment, LLC (“AGKE”) and Jacksonville GK Equipment, LLC (“JGKE”). GKF formed HoldCo GKC S.A. (“HoldCo”) to acquire Gamma Knife Center Ecuador S.A. (“GKCE”). The Company (through ASRS) and Elekta AG (“Elekta”), the manufacturer of the Gamma Knife (through its wholly-owned United States subsidiary, GKV Investments, Inc.), entered into an operating agreement and formed GKF. During 2022, GKF leased Gamma Knife units to twelve medical centers in the United States in the states of California, Florida, Illinois, Indiana, Mississippi, Nebraska, New Mexico, New York, Ohio, Oregon, and Texas. GKF also owns and operates two single-unit Gamma Knife facilities in Lima, Peru and Guayaquil, Ecuador. The Company through its wholly-owned subsidiary, Orlando, provided proton beam radiation therapy (“PBRT”) and related equipment to a customer in the United States. The Company formed the subsidiary GKPeru and acquired GKCE for the purposes of expanding its business internationally; Orlando and LBE to provide PBRT equipment and services in Orlando, Florida and Long Beach, California, respectively; and AGKE and JGKE to provide Gamma Knife equipment and services in Albuquerque, New Mexico and Jacksonville, Florida, respectively. AGKE began operations in the second quarter of 2011 and JGKE began operations in the fourth quarter of 2011. Orlando treated its first patient in April 2016. GKPeru treated its first patient in July 2017. LBE is not expected to generate revenue within the next two years. On April 27, 2022, the Company signed a Joint Venture Agreement (the “Agreement”) with the principal owners of Guadalupe Amor Y Bien (“Guadalupe”) to establish AB Radiocirugia Y Radioterapia de Puebla, S.A.P.I. de C.V. of Puebla (“Puebla”) to treat public- and private-paying cancer patients. The Company and Guadalupe will hold 85% and 15% ownership interests, respectively, in Puebla. Under the Agreement, the Company will be responsible for providing a linear accelerator upgrade to an Elekta Versa HD, and Guadalupe will be accountable for all site modification costs. The Company formed ASHS-Mexico, S.A. de C.V. on October 3, 2022 to establish Puebla in order to provide radiation therapy and radiosurgery services locally in Mexico. Puebla was formed on December 15, 2022. The Company continues to develop its design and business model for The Operating Room for the 21st CenturySM through its 50% owned OR21, LLC (“OR21”). The remaining 50% of OR21 is owned by an architectural design company. OR21 is not expected to generate significant revenue within the next two years. MedLeader was formed to provide continuing medical education online and through videos for doctors, nurses, and other healthcare workers. This subsidiary is not operational at this time. All significant intercompany accounts and transactions have been eliminated in consolidation.

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- Definition The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -URI https://asc.fasb.org/topic&trid=2122149 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -URI https://asc.fasb.org/topic&trid=2197479 + Details
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