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Revenue (Tables) | 6 Months Ended
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Mar. 31, 2021
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table summarizes our revenue by geographic location of our customers (in thousands):
| Three months ended March 31, |  | Six months ended March 31,
| 2021 |  | 2020 |  | 2021 |  | 2020
North America, primarily the United States | $ | 56,423 |  |  | $ | 57,374 |  |  | $ | 110,441 |  |  | $ | 104,910 |
Europe, Middle East & Africa | 11,690 |  |  | 9,885 |  |  | 22,226 |  |  | 18,401 |
Rest of world | 9,188 |  |  | 6,188 |  |  | 17,780 |  |  | 12,453 |
Total revenue | $ | 77,301 |  |  | $ | 73,447 |  |  | $ | 150,447 |  |  | $ | 135,764 |
The following table summarizes our revenue by the timing of revenue recognition (in thousands):
| Three months ended March 31, |  | Six months ended March 31,
| 2021 |  | 2020 |  | 2021 |  | 2020
Transferred at a point in time | $ | 69,144 |  |  | $ | 66,765 |  |  | $ | 133,332 |  |  | $ | 123,065 |
Transferred over time | 8,157 |  |  | 6,682 |  |  | 17,115 |  |  | 12,699 |
Total revenue | $ | 77,301 |  |  | $ | 73,447 |  |  | $ | 150,447 |  |  | $ | 135,764 |
Contract with Customer, Asset and Liability | Changes in unearned revenue were (in thousands):
| Three months ended March 31, |  | Six months ended March 31,
| 2021 |  | 2020 |  | 2021 |  | 2020
Unearned revenue, beginning of period | $ | 13,066 |  |  | $ | 6,802 |  |  | $ | 9,341 |  |  | $ | 5,025 |
Billings | 13,746 |  |  | 9,706 |  |  | 28,013 |  |  | 19,553 |
Revenue recognized | (10,376) |  |  | (7,806) |  |  | (20,918) |  |  | (15,876) |
Unearned revenue, end of period | $ | 16,436 |  |  | $ | 8,702 |  |  | $ | 16,436 |  |  | $ | 8,702 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045 + Details
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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=121604090&loc=SL49130545-203045 + Details
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