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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events [Text Block]	19. Subsequent Events Pursuant to the terms of the Hyperspring Purchase Agreement, GSE Performance was required to pay the Sellers an additional $1.4 million based on EBITDA thresholds for the year ended November 13, 2015. The Sellers were paid on January 8, 2016. On March 17, 2016, GSE was awarded a contract to design, engineer and deliver three full scope simulator systems to an existing client, a major nuclear power plant operator based in the southern United States.