Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Summary of Gross Carrying Amounts and Accumulated Amortization of Intangible Assets (Details)

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Goodwill and Intangible Assets - Summary of Gross Carrying Amounts and Accumulated Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Finite-lived intangible assets    
Gross Carrying Amount $ 38,240 $ 38,240
Accumulated Amortization (20,349) (18,831)
Net Carrying Value 17,891 19,409
Patents    
Finite-lived intangible assets    
Gross Carrying Amount 8,030 8,030
Accumulated Amortization (3,472) (3,289)
Net Carrying Value 4,558 4,741
Developed technology    
Finite-lived intangible assets    
Gross Carrying Amount 27,950 27,950
Accumulated Amortization (14,860) (13,608)
Net Carrying Value 13,090 14,342
Customer relationships—users    
Finite-lived intangible assets    
Gross Carrying Amount 940 940
Accumulated Amortization (940) (940)
Net Carrying Value 0 0
Trade names    
Finite-lived intangible assets    
Gross Carrying Amount 1,320 1,320
Accumulated Amortization (1,077) (994)
Net Carrying Value $ 243 $ 326