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Restructuring and Exit Activities	3 Months Ended
Restructuring and Exit Activities	Mar. 31, 2018
Restructuring and Exit Activities [Abstract]
Restructuring and Exit Activities	Note K: Restructuring and Exit Activities In the third quarter of 2016, in order to streamline our operating and cost structure, we initiated the closure of our wholly-owned subsidiaries, Image Sensing Systems HK Limited (ISS HK) located in Hong Kong; Image Sensing Systems (Shenzhen) Limited (ISS WOFE) located in China; Image Sensing Systems Europe Limited (ISS Europe) located in the United Kingdom; Image Sensing Systems Europe Limited S.P.Z.O.O (ISS Poland) located in Poland; and Image Sensing Systems Germany, GmbH (ISS Germany) located in Germany. We incurred no costs for entity closures in the periods ended March 31, 2018 and 2017.