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Entity Level Information (Tables) | 3 Months Ended
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Mar. 31, 2019
Segment Reporting [Abstract] |
Summary of Revenue by Region | Segment Information—The Company operates in one reporting segment. Operating segments are defined as components of an enterprise about which separate financial information is evaluated regularly by the chief operating decision maker, who is the chief executive officer, in deciding how to allocate resources and assessing performance. The Company’s chief operating decision maker allocates resources and assesses performance based upon discrete financial information at the consolidated level. The following table summarizes the revenue by region based on ship-to destinations for the three months ended March 31, 2019 and 2018:
|  | 2019 |  |  | 2018 |
U.S |  | $ | 20,090 |  |  | $ | 12,425 |
Canada and Latin America |  |  | 3,645 |  |  |  | 2,252 |
Europe and Middle East |  |  | 1,800 |  |  |  | 3,163 |
Asia Pacific |  |  | 949 |  |  |  | 350 |
|  | $ | 26,484 |  |  | $ | 18,190 |
Composition of Revenues | The composition of revenues for the three months ended March 31, 2019 and 2018 is follows:
|  | 2019 |  |  | 2018 |
Product Sales |  | $ | 26,332 |  |  | $ | 16,967 |
Services |  |  | 152 |  |  |  | 1,223 |
Total revenues |  | $ | 26,484 |  |  | $ | 18,190 |
Percentage of Total Revenues | Revenue from customers with concentration greater than 10% in the three months ended March 31, 2019 and 2018 accounted for approximately the following percentage of total revenues:
|  | 2019 |  |  | 2018 |
Customer A |  | 37% |  |  | * |
Customer B |  | 14% |  |  | 38% |
Customer C |  | 13% |  |  | 6% |
Customer D |  | * |  |  | 17% |
Customer E |  | * |  |  | 10% |
* | Customer revenue did not exceed 10% in the respective periods.

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