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Summary of Significant Accounting Policies and Estimates - Schedule of Contract Liabilities (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($)
Accounting Policies [Abstract] |
Balance at January 1, 2018 | $ 3,627
New performance obligations | 1,921
Recognition of revenue as a result of satisfying performance obligations | (4,147)
Balance at December 31, 2018 | 1,401
Less non-current portion | (30)
Current portion at December 31, 2018 | $ 1,371

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