Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands				12 Months Ended
	Oct. 31, 2017	Dec. 16, 2016	Oct. 21, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Mar. 03, 2016
Loss Contingencies [Line Items]
Rental payment of leases				$ 2,847	$ 3,190	$ 1,642
(Gain) loss on disputed mophie purchase price	$ 6,967			$ 6,967	$ (24,317)	$ 0
Mophie Inc
Loss Contingencies [Line Items]
Damages exceeding value		$ 22,000
Paid to principal shareholders in escrow account							$ 2,000
Settlement amount	8,000
(Gain) loss on disputed mophie purchase price	$ 6,967
Daniel Huang, Individually and As Shareholder Representative v. ZAGG , Inc
Loss Contingencies [Line Items]
Damages sought			$ 11,420