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Acquisitions and Divestitures - MotionDSP (Details) - USD ($)
$ in Millions
4 Months Ended
Feb. 21, 2018
Feb. 21, 2018
Oct. 31, 2017
MotionDSP      
Business acquisition      
Cash consideration paid $ 4.8    
MotionDSP      
Equity method investment      
Purchase price of capital stock     $ 4.7
Ownership percentage 49.00% 49.00% 49.00%
Net loss from equity method investment   $ (0.2)