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Segment Reporting (Tables) | 6 Months Ended
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Jun. 30, 2019
Percentage of Revenue from Significant Customers | Revenue from significant customers as a percentage of the Company’s total revenue is as follows:
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
GE Healthcare |  |  | 16 | % |  |  | 14 | % |  |  | 14 | % |  |  | 16 | %
MilliporeSigma |  |  | 13 | % |  |  | 18 | % |  |  | 14 | % |  |  | 17 | %
Total Revenue |
Percentage by Geographic Area or Significant Customers | The following table represents the Company’s total revenue by geographic area (based on the location of the customer):
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Revenue by customers’ geographic locations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
North America |  |  | 51 | % |  |  | 47 | % |  |  | 49 | % |  |  | 46 | %
Europe |  |  | 38 | % |  |  | 41 | % |  |  | 39 | % |  |  | 42 | %
APAC |  |  | 11 | % |  |  | 12 | % |  |  | 12 | % |  |  | 12 | %
Total revenue |  |  | 100 | % |  |  | 100 | % |  |  | 100 | % |  |  | 100 | %
Accounts Receivable |
Percentage by Geographic Area or Significant Customers | Significant accounts receivable balances as a percentage of the Company’s total trade accounts receivable are as follows:
|  | June 30, |  |  | December 31, |
|  | 2019 |  |  | 2018 |
GE Healthcare |  |  | 18 | % |  |  | 17 | %
MilliporeSigma |  |  | 10 | % |  |  | 11 | %

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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