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Commitments and Contingencies - Contingencies (Details)
$ in Thousands
Jun. 15, 2016
plaintiff
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Loss Contingencies [Line Items]      
Number of purported shareholders that have filed lawsuits | plaintiff 2    
Securities Litigation Case | Pending Litigation      
Loss Contingencies [Line Items]      
Loss contingency accrual   $ 0 $ 0
Gemalto Suit | Pending Litigation      
Loss Contingencies [Line Items]      
Loss contingency accrual   $ 0 $ 0