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Convertible Notes - Schedule of key terms of convertible notes (Detail) | 6 Months Ended
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Jun. 30, 2021 $ / shares shares
2021 Notes |
Debt Instrument [Line Items] |
Maturity date (unless earlier converted, repurchased or redeemed) | Jun. 15, 2026
Interest rate | 3.25%
Conversion price | $ 11.04
Conversion rate | shares | 90.5797
Redemption price | $ 14.35
2020 Notes |
Debt Instrument [Line Items] |
Maturity date (unless earlier converted, repurchased or redeemed) | Jun. 15, 2023
Interest rate | 4.25%
Conversion price | $ 5.92
Conversion rate | shares | 168.9189
Redemption price | $ 7.70

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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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