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Revenue (Tables) | 3 Months Ended
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Dec. 31, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following summarizes our revenue by geographic location of our customers:
|  | Three months ended December 31,
($ in thousands) |  | 2019 |  | 2018
North America, primarily the United States |  | $ | 47,536 |  |  | $ | 46,335 |
Europe, Middle East & Africa |  | 8,516 |  |  | 10,104 |
Rest of world |  | 6,265 |  |  | 5,874 |
Total revenue |  | $ | 62,317 |  |  | $ | 62,313 |
9. REVENUE (CONTINUED) The following summarizes our revenue by the timing of revenue recognition:
|  | Three months ended December 31,
($ in thousands) |  | 2019 |  | 2018
Transferred at a point in time |  | $ | 56,300 |  |  | $ | 57,463 |
Transferred over time |  | 6,017 |  |  | 4,850 |
Total revenue |  | $ | 62,317 |  |  | $ | 62,313 |
Contract with Customer, Asset and Liability | Changes in unearned revenue were:
($ in thousands) |  | Three months ended December 31, 2019
Unearned revenue, beginning of period |  | $ | 5,025 |
Billings |  | 9,847 |
Revenue recognized |  | (8,070 | )
Unearned revenue, end of period |  | $ | 6,802 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + 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=118956577&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=118956577&loc=SL49130545-203045 + Details
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