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Revenue (Tables) | 9 Months Ended
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Sep. 30, 2021
Revenue from Contract with Customer [Abstract] |
Revenue Recognized |
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Revenue recognized over time | $ | 1,527 |  |  | $ | 1,239 |  |  | $ | 4,448 |  |  | $ | 3,696 |
Revenue recognized at a point in time | 1,393 |  |  | 1,250 |  |  | 3,892 |  |  | 3,236 |
Total revenue | $ | 2,920 |  |  | $ | 2,489 |  |  | $ | 8,340 |  |  | $ | 6,932 |

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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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