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Revenue (Tables) | 3 Months Ended
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Mar. 31, 2022
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table sets forth our net revenues by category:
| Three Months Ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
Platform revenue | $ | 2,492 |  |  | $ | 1,646 |  |  |  |  |
Hardware revenue | 4,286 |  |  | — |  |  |  |  |
Net revenues | $ | 6,778 |  |  | $ | 1,646 |  |  |  |  |
Schedules of Concentration Risk | The following table sets forth our concentration of accounts receivable, net of specific allowances for doubtful accounts.
| March 31, 2022 |  | December 31, 2021
Customer A | 19 | % |  | — | %
Customer B | 14 | % |  | — | %
Customer C | 10 | % |  | 18 | %
Customer D | — | % |  | 20 | %
The following table sets forth our concentration of revenue sources as a percentage of total net revenues.
| Three Months Ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
Customer B | 1 | % |  | 15 | % |  |  |  |
Customer E | — | % |  | 17 | % |  |  |  |
Customer F | — | % |  | 13 | % |  |  |  |
Customer G | 1 | % |  | 10 | % |  |  |  |
Deferred Revenue | Our deferred revenue balance consisted of the following:
| March 31, 2022 |  | December 31, 2021
Current deferred revenue |  |  |
Platform revenue | $ | 1,919 |  |  | $ | 1,824 |
Hardware revenue | 1,344 |  |  | 2,149 |
Total current deferred revenue | $ | 3,263 |  |  | $ | 3,973 |
Non-current deferred revenue |  |  |
Platform revenue | $ | 1,008 |  |  | $ | 1,299 |
Total non-current deferred revenue | $ | 1,008 |  |  | $ | 1,299 |
Total deferred revenue | $ | 4,271 |  |  | $ | 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 http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 + Details
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