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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2022
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table sets forth our net revenues by category:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Platform revenue | $ | 1,628 |  |  | $ | 1,436 |  |  | $ | 4,120 |  |  | $ | 3,082 |
Hardware revenue | 3,857 |  |  | — |  |  | 8,143 |  |  | — |
Net revenues | $ | 5,485 |  |  | $ | 1,436 |  |  | $ | 12,263 |  |  | $ | 3,082 |
Schedules of Concentration Risk | The following table sets forth our concentration of accounts receivable, net of specific allowances for doubtful accounts.
| June 30, 2022 |  | December 31, 2021
Customer A | 12 | % |  | — | %
Customer B | 10 | % |  | — | %
Customer C | 7 | % |  | 18 | %
Customer D | — | % |  | 20 | %
The following table sets forth our concentration of revenue sources as a percentage of total net revenues:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2022 |  | 2021 |  | 2022 |  | 2021
Customer E | 1 | % |  | 6 | % |  | 1 | % |  | 11 | %
Customer F | — | % |  | 21 | % |  | — | % |  | 19 | %
Customer G | — | % |  | 13 | % |  | — | % |  | 11 | %
Deferred Revenue | Our deferred revenue balance consisted of the following:
| June 30, 2022 |  | December 31, 2021
Current deferred revenue |  |  |
Platform revenue | $ | 1,616 |  |  | $ | 1,824 |
Hardware revenue | 99 |  |  | 2,149 |
Total current deferred revenue | $ | 1,715 |  |  | $ | 3,973 |
Non-current deferred revenue |  |  |
Platform revenue | $ | 859 |  |  | $ | 1,299 |
Total non-current deferred revenue | $ | 859 |  |  | $ | 1,299 |
Total deferred revenue | $ | 2,574 |  |  | $ | 5,272 |

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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 https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045 + Details
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