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Revenue recognition | 9 Months Ended
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Sep. 30, 2022
Revenue from Contract with Customer [Abstract] |
Revenue recognition | 3. Revenue recognition Deferred revenue— Revenue recognized for the three months ended September 30, 2022 from amounts included in deferred revenue as of June 30, 2022 was $122.5 million. Revenue recognized for the three months ended September 30, 2021 from amounts included in deferred revenue as of June 30, 2021 was $92.4 million. Revenue recognized for the nine months ended September 30, 2022 from amounts included in deferred revenue as of December 31, 2021 was $187.4 million. Revenue recognized for the nine months ended September 30, 2021 from amounts included in deferred revenue as of December 31, 2020 was $127.4 million. The below table presents a summary of deferred revenue balances by reportable segment (in thousands):
| September 30, |  | December 31, |  | December 31,
| 2022 |  | 2021 |  | 2020
Deferred revenue: |  |  |  |  |
Enterprise | $ | 186,646 |  |  | $ | 148,966 |  |  | $ | 84,241 |
Consumer | 54,302 |  |  | 61,588 |  |  | 58,135 |
Total deferred revenue | $ | 240,948 |  |  | $ | 210,554 |  |  | $ | 142,376 |
Remaining performance obligations— Remaining performance obligations represent the aggregate amount of the transaction price in contracts for performance obligations not delivered, or partially undelivered, as of the end of the reporting period. Remaining performance obligations primarily relate to unearned revenue from Consumer single course purchase arrangements and unearned and unbilled revenue from multi-year Enterprise subscription contracts with future installment payments at the end of any given period. As of September 30, 2022, the aggregate transaction price for remaining performance obligations was $433.7 million, of which 69% is expected to be recognized over the next twelve months and the remainder thereafter. Deferred contract costs— The following table represents a rollforward of the Company’s deferred contract costs (in thousands):
| Balance at Beginning of Period |  | Additions |  | Amortization Expense |  | Balance at End of Period
Nine months ended September 30, 2022 | $ | 44,545 |  |  | $ | 40,203 |  |  | $ | (22,558) |  |  | $ | 62,190 |
Nine months ended September 30, 2021 | $ | 25,837 |  |  | $ | 25,455 |  |  | $ | (11,995) |  |  | $ | 39,297 |

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI https://asc.fasb.org/topic&trid=49130388 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130556-203045 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130550-203045 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130558-203045 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 + Details
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