Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Details)

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Employee Benefit Plans (Details) - Skyhook - Skyhook 401(k) Plan - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Company matching contribution (as a percent) 100.00%    
Employee salary eligible for matching contributions (as a percent) 10.00%    
Employer cash contribution $ 0.8 $ 0.8 $ 1.0