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Business and Basis of Presentation	12 Months Ended
Business and Basis of Presentation	Dec. 31, 2014
Business and Basis of Presentation [Abstract]
Business and Basis of Presentation	1. Business and Basis of Presentation GSE Systems, Inc. ("GSE Systems", "GSE" or the "Company") improves human performance through a series of technologies and services that systematically helps clients with everything from recruiting and selecting the right person for the job to training that individual throughout their career from entry-level to expert. We improve plant performance with a combination of engineering, simulation and plant services that help clients get their plants producing revenue faster, running them safely and responsibly decommissioning them. The Company's operations are subject to certain risks and uncertainties including, among others, rapid technological changes, success of the Company's product development, marketing and distribution strategies, the need to manage growth, the need to retain key personnel and protect intellectual property, and the availability of additional financing on terms acceptable to the Company.