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Disaggregation of Revenue (Notes) | 6 Months Ended
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Jun. 30, 2020
Disaggregation of Revenue [Abstract] |
Disaggregation of Revenue [Text Block] | Disaggregation of Revenue Revenue by Geography The geographic information in the table below is presented for the three and six months ended June 30, 2020 and 2019. The Company categorizes geographic revenues based on the location of the customer's headquarters. Because the Company's contracts are predominately denominated in U.S. dollars, it has limited exposure to foreign currency exchange risk as discussed under "Foreign Currency Exchange Risk" of Part I, Item 3 below.
| Three Months Ended June 30, |  |  |  |  |  |  |  | Six Months Ended June 30, |  |  |  |  |  |
| 2020 |  |  |  | 2019 |  |  |  | 2020 |  |  |  | 2019 |  |
(in thousands) | Revenue |  | Percent |  | Revenue |  | Percent |  | Revenue |  | Percent |  | Revenue |  | Percent
United States of America | $ | 20,715 |  |  | 32 | % |  | $ | 20,862 |  |  | 33 | % |  | $ | 42,515 |  |  | 33 | % |  | $ | 40,642 |  |  | 34 | %
Europe | 17,682 |  |  | 28 | % |  | 18,720 |  |  | 29 | % |  | 37,612 |  |  | 29 | % |  | 36,007 |  |  | 30 | %
The rest of the world | 25,350 |  |  | 40 | % |  | 24,296 |  |  | 38 | % |  | 49,931 |  |  | 38 | % |  | 43,360 |  |  | 36 | %
Total revenue | $ | 63,747 |  |  | 100 | % |  | $ | 63,878 |  |  | 100 | % |  | $ | 130,058 |  |  | 100 | % |  | $ | 120,009 |  |  | 100 | %

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