Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] | Note 1. Basis of Presentation In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting of normal recurring accruals and entries to record the impairment of the Company’s investment in equity securities and the sale of EWRS Tibbi Cihazlar Ticaret Ltd Sti, “EWRS Turkey”) necessary to present fairly American Shared Hospital Services’ consolidated financial position as of June 30, 2015 and the results of its operations for the three and six month periods ended June 30, 2015 and 2014, which results are not necessarily indicative of results on an annualized basis. Consolidated balance sheet amounts as of December 31, 2014 have been derived from audited consolidated financial statements. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the year ended December 31, 2014 included in the Company’s 10-K filed with the Securities and Exchange Commission. These condensed consolidated financial statements include the accounts of American Shared Hospital Services (the “Company”) and its wholly-owned subsidiaries: OR21, Inc. (“OR21”); MedLeader.com, Inc. (“MedLeader”); and American Shared Radiosurgery Services (“ASRS”); ASRS’ majority-owned subsidiary, GK Financing, LLC (“GKF”); GKF’s wholly-owned subsidiaries, GK Financing U.K., Limited (“GKUK”), Instituto de Gamma Knife del Pacifico S.A.C. (“GKPeru”); ASHS’ majority owned subsidiary, Long Beach Equipment, LLC (“LBE”), GKF’s majority owned subsidiaries, Albuquerque GK Equipment, LLC (“AGKE”), Jacksonville GK Equipment, LLC (“JGKE”) and EWRS, LLC (“EWRS”). EWRS owned 100 The Company through its majority-owned subsidiary, GKF, provided Gamma Knife units to seventeen medical centers as of June 30, 2015 in the states of Arkansas, California, Connecticut, Florida, Illinois, Massachusetts, Mississippi, Nevada, New Jersey, New Mexico, New York, Tennessee, Oklahoma, Ohio, Texas, and Washington. The Company also directly provides radiation therapy and related equipment, including Intensity Modulated Radiation Therapy (“IMRT”), Image Guided Radiation Therapy (“IGRT”) and a CT Simulator to the radiation therapy department at an existing Gamma Knife site in the United States. The Company formed the subsidiaries GKUK and GKPeru, for the purposes of expanding its business internationally into the United Kingdom and Peru; LBE to provide proton beam therapy services in Long Beach, California; and AGKE and JGKE to provide Gamma Knife services in Albuquerque, New Mexico and Jacksonville, Florida. AGKE began operation in the second quarter 2011 and JGKE began operation in the fourth quarter 2011. GKPeru is expected to begin operation in the latter part of 2015/early 2016. GKUK is inactive and LBE is not expected to generate revenue within the next two years. Based on guidance provided in accordance with Accounting Standards Codification (“ASC”) 830, Foreign Currency Matters As of June 10, 2014 EWRS Turkey’s balance sheet accounts were translated at rates in effect as of those dates, respectively, and income and expense accounts were translated at the weighted average rates of exchange during those respective periods. Gains and losses from foreign currency transactions and remeasurement are listed in the Company’s Condensed Consolidated Statements of Operations. The Company recorded a net foreign currency gain of $ 146,000 161,000 Based on guidance provided in accordance with Accounting Standards Update (“ASU”) No. 2014-08 Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity Based on guidance provided in accordance with ASU No 2013-05 Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries of Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity 779,000 Based on guidance provided in accordance with ASC 280 Segment Reporting Effective May 31, 2014 (with closing occurring June 10, 2014) the Company sold EWRS Turkey for EUR 4.2 6.0 768,000 572,000 Based on guidance provided in ASC 320 Investments Debt and Equity Securities Other Than Temporary Impairment (“OTTI”) of Certain Investments in Equity Securities 600,000 2,114,000 In January 2015, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2015-01, Income Statement - Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items International Accounting Standards 1, Presentation of Financial Statements In February 2015, the FASB issued ASU No. 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis In April 2015, the FASB issued ASU No. 2015-03, InterestImputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) |