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Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Acquired Finite-Lived Intangible Assets |  |
Gross Carrying Amount | $ 3,030 | $ 3,030
Accumulated Amortization | (2,189) | (1,957)
Total | 841 | 1,073
Developed technology |  |
Acquired Finite-Lived Intangible Assets |  |
Gross Carrying Amount | 2,460 | 2,460
Accumulated Amortization | (1,653) | (1,478)
Total | 807 | 982
Customer relationships |  |
Acquired Finite-Lived Intangible Assets |  |
Gross Carrying Amount | 520 | 520
Accumulated Amortization | (489) | (437)
Total | 31 | 83
Domain names |  |
Acquired Finite-Lived Intangible Assets |  |
Gross Carrying Amount | 50 | 50
Accumulated Amortization | (47) | (42)
Total | $ 3 | $ 8

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