Revenue - Performance Obligations and Contract Balances (Details) - USD ($) |
9 Months Ended | ||
|---|---|---|---|
Sep. 30, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Revenue from Contract with Customer [Abstract] | |||
| Contract assets | $ 0 | $ 0 | $ 0 |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |||
| Remaining performance obligation | $ 3,800,000 | ||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01 | |||
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |||
| Revenue recognition period | six months |
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of transaction price allocated to performance obligation that has not been recognized as revenue. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Details
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