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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In January 2018, Spongecell, Inc. merged into Flashtalking, a privately-held company. The Company received Flashtalking ordinary shares equal to approximately 10% of Flashtalking’s issued share capital at the time of the closing. The Company’s final number of Flashtalking shares will be subject to customary indemnification and working capital provisions and agreements.