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Acquisitions Tellimer Acquisition (Details) - Tellimer [Member] - USD ($)
$ in Millions
6 Months Ended
Mar. 31, 2020
Jun. 30, 2020
Business Acquisition [Line Items]    
Business Combination, Consideration Transferred $ 4.7  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents   $ 1.0
Business Combination, Acquired Receivable, Fair Value   1.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment   0.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets   3.4
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities   $ 1.0