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Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 2018
Disaggregation of Revenue | Revenues for the three-month periods ended March 31, 2018 and 2017 were as follows:
|  | Three months ended March 31, |
(in thousands, except percentages) |  | 2018 |  |  | 2017 |  |  | $ Change |  |  | % Change |
Product revenue |  | $ | 44,799 |  |  | $ | 30,569 |  |  | $ | 14,230 |  |  |  | 47 | %
Royalty and other revenue |  |  | 31 |  |  |  | 21 |  |  |  | 10 |  |  |  | 48 | %
Total revenue |  | $ | 44,830 |  |  | $ | 30,590 |  |  | $ | 14,240 |  |  |  | 47 | %
Disaggregation of Revenue from Contracts with Customers by Geographic Region | The following tables disaggregate the Company’s revenue from contracts with customers by geographic region (in thousands).
|  | Three months ended March 31, 2018 |
North America |  | $ | 20,239 |
Europe |  |  | 19,401 |
Asia and Pacific |  |  | 4,947 |
Other |  |  | 243 |
Total revenue |  | $ | 44,830 |
Revenue from Significant Customers | Revenue from significant customers is as follows (in thousands):
|  | Three months ended March 31, 2018 |
GE Healthcare |  | $ | 7,717 |
MilliporeSigma |  | $ | 6,465 |
Summary of Receivables and Deferred Revenue from Contracts with Customers | The following table provides information about receivables and deferred revenue from contracts with customers as of March 31, 2018:
|  | 2018 |
Balances from contracts with customers only: |  |  |  |
Accounts receivable |  | $ | 29,352 |
Deferred revenue |  |  | 1,547 |
Revenue recognized in the period relating to: |  |  |  |
The beginning deferred revenue balance |  | $ | 434 |
Changes in pricing related to products or services satisfied in previous periods |  |  | — |
Impairment losses on receivables |  |  | — |

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- Definition Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph a -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
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