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Revenue and Related Matters (Tables) | 9 Months Ended
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Sep. 30, 2021
Revenue from Contract with Customer [Abstract] |
Schedule of Disaggregation of Revenue by Geography and Recognition Timing | The Company disaggregates revenue as set forth in the following tables (in thousands): Revenue by Geography
|  | For the Three Months Ended September 30, |  |  | For the Nine Months Ended September 30, |
Revenues: (1) |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
North America |  | $ | 94,700 |  |  | $ | 89,478 |  |  | $ | 290,967 |  |  | $ | 272,657 |
Europe |  |  | 15,102 |  |  |  | 11,861 |  |  |  | 45,771 |  |  |  | 35,436 |
Asia Pacific |  |  | 6,721 |  |  |  | 6,015 |  |  |  | 19,435 |  |  |  | 16,793 |
Other |  |  | 1,613 |  |  |  | 1,223 |  |  |  | 4,414 |  |  |  | 3,577 |
Total |  | $ | 118,136 |  |  | $ | 108,577 |  |  | $ | 360,587 |  |  | $ | 328,463 |
(1) Revenue location is determined based on where the products and services are consumed.
Summary of Allowance for Expected Credit Losses on Accounts Receivable | The allowance for expected credit losses on accounts receivable for the nine months ended September 30, 2021 is summarized as follows (in thousands):
|  | Total Allowance |
Balance at December 31, 2020 |  | $ | 708 |
Provision for expected credit losses |  |  | 347 |
Write-offs |  |  | (383 | )
Balance at September 30, 2021 |  | $ | 672 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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