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v3.21.2

Commitments and contingencies - Loan Exit Fee, Supply Agreement and Software Subscription (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2016
--- | --- | --- | ---
Loan exit fee |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Loan exit fee |  |  | $ 0.8
Obligation |  | $ 0.0 |
Loan exit fee | Minimum |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Percentage of common stock |  |  | 50.00%
Supply arrangement |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Accrued liability | $ 0.3 | 0.1 |
Supply agreement |  |  |
Accrued supply agreement amount | 0.8 |  |
Software subscription |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Obligation | 1.1 |  |
Accrued liability | $ 0.0 | $ 0.0 |

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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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. + References No definition available. + Details
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- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
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- Details
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- Details
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