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v3.20.4

Convertible Senior Notes - Additional information (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
May 31, 2020 USD ($) | Dec. 31, 2020 USD ($) item $ / shares shares | Dec. 14, 2018
Debt Instrument [Line Items] |  |  |
Aggregate principal amount | $ 115,000,000.0 | $ 1,000 |
Interest rate (as a percent) | 3.00% | 3.00% |
Underwriting discounts and commissions | $ 3,700,000 |  |
Common stock issued upon conversion of notes | shares |  | 4,810,002 |
Conversion rate |  | 130 |
Interest expense |  | $ 300,000 |
Initial conversion price (in dollars per share) | $ / shares |  | $ 23.91 |
Threshold maximum conversion rate |  | $ 48.10 |
Debt issuance costs |  | $ 4,100,000 |
Long-term Debt, Term |  | 5 years |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.74% |
Notes payable, 2025 |  | $ 115,000,000.0 |
Threshold maximum combined interest rate (as a percent) |  | 0.50% |
Cash payment to each noteholder (as a percent) |  | 3.00% |
Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Common stock issued upon conversion of notes | shares |  | 4,810,002 |
Initial conversion price (in dollars per share) | $ / shares |  | $ 41.8261 |
Convertible Note [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 3.00%
Private Placement |  |  |
Debt Instrument [Line Items] |  |  |
Aggregate principal amount | 15,000,000.0 |  |
Proceeds from the offering | 111,300,000 |  |
Third-party offering related costs | $ 300,000 |  |
First 90 days beginning on, and including the date on which such Registration Default occurs |  |  |
Debt Instrument [Line Items] |  |  |
Threshold trading days for redemption of notes | item |  | 20 |
Additional interest rate (as a percent) |  | 0.25% |
After 90 days of the occurrence of Registration Default |  |  |
Debt Instrument [Line Items] |  |  |
Threshold consecutive trading days for redemption of notes | item |  | 30 |
Additional interest rate (as a percent) |  | 0.50% |

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