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Concentration of Risks (Tables) | 12 Months Ended
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Dec. 31, 2018
Risks and Uncertainties [Abstract] |
Summary of Concentration of Risk | The following table presents customers representing greater than 10% of total revenues and/or outstanding receivable as of and for the years ended December 31, 2018 and 2017 (in thousands):
|  | Revenue |  |  | % |  |  | Accounts Receivable |  |  | % |
2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer 1 |  | $ | 9,710 |  |  |  | 26 | % |  | $ | 998 |  |  |  | 23 | %
Customer 2 |  |  | 4,451 |  |  |  | 12 | % |  |  | 113 |  |  |  | 3 | %
|  | $ | 14,161 |  |  |  | 38 | % |  | $ | 1,111 |  |  |  | 26 | %
2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer 1 |  | $ | 8,561 |  |  |  | 42 | % |  | $ | 1,126 |  |  |  | 30 | %
Customer 2 |  |  | 2,249 |  |  |  | 11 | % |  |  | 290 |  |  |  | 8 | %
|  | $ | 10,810 |  |  |  | 53 | % |  | $ | 1,416 |  |  |  | 38 | %

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