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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2021
Revenue from Contract with Customer [Abstract] |
Schedule of Deferred Revenue | The deferred revenue balances from contracts with customers were as follows:
| Years Ended December 31,
(in thousands) | 2021 |  | 2020 |  | 2019
Deferred revenue, beginning of the period | $ | 1,105 |  |  | $ | 137 |  |  | $ | 96 |
Deferred revenue, end of the period | 1,212 |  |  | 1,105 |  |  | 137 |
Change in deferred revenue during the period | $ | 107 |  |  | $ | 968 |  |  | $ | 41 |

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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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- References No definition available. + Details
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