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v3.23.1

Debt - Senior Notes (Details) | 1 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 USD ($) day $ / shares | Jun. 30, 2020 USD ($) day $ / shares | Mar. 31, 2023 USD ($) $ / shares | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jan. 01, 2021 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' equity |  |  |  | $ 164,875,000 | $ 164,436,000 | $ 166,555,000 | $ 169,900,000 |
Long-term debt |  |  |  | 356,078,000 |  | 355,580,000 |  |
Cash interest expense |  |  |  | 2,752,000 | 2,798,000 |  |  |
Amortization of debt issuance costs |  |  |  | 498,000 | 480,000 |  |  |
Additional Paid-In Capital |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' equity |  |  |  | 966,515,000 | 916,191,000 | 955,509,000 | 903,470,000 |
Accumulated Deficit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' equity |  |  |  | (801,641,000) | (751,756,000) | (788,955,000) | $ (733,571,000) |
Cumulative effect adjustment | Accounting Standards Update 2020-06 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 42,400,000
Cumulative effect adjustment | Accounting Standards Update 2020-06 | Additional Paid-In Capital |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' equity |  |  |  |  |  |  |  | (45,500,000)
Cumulative effect adjustment | Accounting Standards Update 2020-06 | Accumulated Deficit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Stockholders' equity |  |  |  |  |  |  |  | $ 3,100,000
Convertible Senior Notes | 2025 Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount |  |  | $ 150,000,000 |  |  |  |  |
Stated interest rate |  |  | 5.00% |  |  |  |  |
Total issuance costs |  |  | $ 5,700,000 |  |  |  |  |
Proceeds from issuance of debt, net of discounts and debt issuance costs |  |  | $ 144,300,000 |  |  |  |  |
Long-term debt |  |  |  | $ 146,976,000 |  | 146,726,000 |  |
Effective interest rate |  |  |  | 5.80% |  |  |  |
Cash interest expense |  |  |  | $ 1,900,000 | 1,900,000 |  |  |
Amortization of debt discount and issuance costs |  |  |  | $ 300,000 | $ 200,000 |  |  |
Conversion rate | 0.0793903 |  |  |  |  |  |  |
Conversion price (in dollars per share) | $ / shares |  |  | $ 12.60 | $ 12.60 |  |  |  |
Threshold percentage of stock price trigger for redemption |  |  | 130.00% |  |  |  |  |
Period over which default must be cured or waived after notice is given |  |  | 60 days |  |  |  |  |
Amount of judgment payments rendered that classify as an event of default |  |  | $ 10,000,000 |  |  |  |  |
Discharge or stay period for judgment |  |  | 45 days |  |  |  |  |
Percent of the aggregate principal amount due upon event of default |  |  | 25.00% |  |  |  |  |
Special interest rate period |  |  | 180 days |  |  |  |  |
Special interest rate |  |  | 0.50% |  |  |  |  |
Convertible Senior Notes | 2025 Notes | Fair Value, Inputs, Level 2 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Estimated fair value of long-term debt |  |  |  | $ 155,100,000 |  |  |  |
Convertible Senior Notes | 2025 Notes | Conversion Condition 1 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Threshold percentage of stock price trigger for conversion |  |  | 130.00% |  |  |  |  |
Threshold trading days for conversion | day |  |  | 20 |  |  |  |  |
Threshold consecutive trading days for conversion | day |  |  | 30 |  |  |  |  |
Convertible Senior Notes | 2025 Notes | Conversion Condition 2 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Threshold percentage of stock price trigger for conversion |  |  | 98.00% |  |  |  |  |
Threshold consecutive trading days for conversion | day |  |  | 10 |  |  |  |  |
Convertible Senior Notes | 2026 Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Aggregate principal amount |  | $ 212,750,000 |  |  |  |  |  |
Stated interest rate |  | 0.75% |  |  |  |  |  |
Long-term debt |  |  |  | $ 209,102,000 |  | $ 208,854,000 |  |
Effective interest rate |  |  |  | 1.30% | 1.30% |  |  |
Cash interest expense |  |  |  | $ 400,000 | $ 400,000 |  |  |
Conversion rate |  | 0.0358616 |  |  |  |  |  |
Conversion price (in dollars per share) | $ / shares |  | $ 27.89 |  |  |  |  |  |
Threshold percentage of stock price trigger for redemption |  | 130.00% |  |  |  |  |  |
Period over which default must be cured or waived after notice is given |  | 60 days |  |  |  |  |  |
Percent of the aggregate principal amount due upon event of default |  | 25.00% |  |  |  |  |  |
Special interest rate period |  | 180 days |  |  |  |  |  |
Special interest rate |  | 0.50% |  |  |  |  |  |
Estimated fair value of long-term debt |  |  |  | 165,300,000 |  |  |  |
Debt issuance costs and discount |  | $ 5,700,000 |  |  |  |  |  |
Proceeds from the issuance of debt |  | $ 207,000,000 |  |  |  |  |  |
Threshold trading days for redemption | day |  | 20 |  |  |  |  |  |
Threshold consecutive trading days for redemption | day |  | 30 |  |  |  |  |  |
Cure period |  | 30 days |  |  |  |  |  |
Default on debt by the Company or subsidiary that classifies as an Event of Default |  | $ 10,000,000 |  |  |  |  |  |
Amortization of debt issuance costs |  |  |  | $ 200,000 | $ 200,000 |  |  |
Convertible Senior Notes | 2026 Notes | Conversion Condition 1 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Threshold percentage of stock price trigger for conversion |  | 130.00% |  |  |  |  |  |
Threshold trading days for conversion | day |  | 20 |  |  |  |  |  |
Threshold consecutive trading days for conversion | day |  | 30 |  |  |  |  |  |
Convertible Senior Notes | 2026 Notes | Conversion Condition 2 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Threshold percentage of stock price trigger for conversion |  | 98.00% |  |  |  |  |  |
Threshold consecutive trading days for conversion | day |  | 10 |  |  |  |  |  |

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