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DEBT - Convertible Senior Notes (Details) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 07, 2022 USD ($) | Aug. 07, 2017 USD ($) $ / shares | Jul. 31, 2014 $ / shares $ / Item | Jan. 31, 2013 USD ($) $ / shares $ / Item | Mar. 31, 2022 USD ($) $ / shares $ / Item | Dec. 31, 2023 USD ($) $ / shares | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Apr. 18, 2022 USD ($) | Jan. 01, 2022 | Aug. 01, 2017 $ / shares | Dec. 31, 2016 USD ($)
Debt |  |  |  |  |  |  |  |  |  |  |  |
Payment for repurchase of debt instrument |  |  |  |  |  | $ 96,204 | $ 165,131 | $ 0 |  |  |  |
Liability component |  |  |  |  |  |  |  |  |  |  |  |
Principal |  |  |  |  |  | 453,500 | 549,704 |  |  |  |  |
Debt discount and issuance costs, net |  |  |  |  |  | (7,266) | (9,331) |  |  |  |  |
2023 Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Convertible notes Face Value |  |  |  |  |  | $ 96,200 |  |  |  |  |  |
2025 Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Common stock price to current conversion price ratio |  |  |  |  |  | 130.00% |  |  |  |  |  |
Average trading price percentage |  |  |  |  |  | 98.00% |  |  |  |  |  |
Effective interest rate |  |  |  |  |  | 8.87% |  |  |  |  |  |
Total issuance costs |  |  |  |  |  | $ 5,400 |  |  |  |  |  |
Liability issuance costs |  |  |  |  |  | 3,500 |  |  |  |  |  |
Equity issuance costs |  |  |  |  |  | 1,900 |  |  |  |  |  |
2025 Notes | ASU 2020-06 |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Unamortized Debt discount |  |  |  |  |  | $ 67,300 |  |  |  |  |  |
Effective interest rate |  |  |  |  |  |  |  |  |  | 2.88% |  |
2025 Notes | Common stock |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Share Price | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 13.28 |
2028 Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, covenant terms description |  |  |  |  |  | The indenture governing the 2028 Notes contains customary terms and covenants, including a merger covenant and that upon certain events of default occurring and continuing, either the Trustee or the holders of at least 25% of the aggregate principal amount of the outstanding Notes may declare 100% of the principal of, and accrued and unpaid interest, if any, on, all the Notes to be due and payable immediately. |  |  |  |  |  |
Convertible senior notes | 2025 Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Ratio of repurchase price to the principal amount |  |  |  |  |  | 100.00% |  |  |  |  |  |
Effective interest rate |  |  |  |  |  |  |  |  |  | 2.88% |  |
Liability component |  |  |  |  |  |  |  |  |  |  |  |
Principal |  |  |  |  |  | $ 192,500 | 192,500 |  |  |  |  |
Debt discount and issuance costs, net |  |  |  |  |  | (1,205) | (1,917) |  |  |  |  |
Net carrying amount |  |  |  |  |  | 191,295 | 190,583 |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  |  | 4,813 | 4,813 | 4,813 |  |  |  |
Amortization of debt issuance costs |  |  |  |  |  | 712 | 692 | 657 |  |  |  |
Amortization of debt discount |  |  |  |  |  | 0 | 0 | 7,898 |  |  |  |
Total interest and amortization expense |  |  |  |  |  | $ 5,525 | 5,505 | 13,368 |  |  |  |
Convertible senior notes | 2025 Notes | Over-Allotment Option |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Convertible notes Face Value |  | $ 17,500 |  |  |  |  |  |  |  |  |  |
Portion of debt instrument face amount, Exercised |  | 17,500 |  |  |  |  |  |  |  |  |  |
Convertible senior notes | 2025 Notes | Private Placement |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Convertible notes Face Value |  | $ 192,500 |  |  |  |  |  |  |  |  |  |
Debt Instrument, annual interest rate |  | 2.50% |  |  |  |  |  |  |  |  |  |
Convertible senior notes | 2025 Notes | Common stock |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate for shares of common stock per $1,000 principal |  | 57.924 |  |  |  |  |  |  |  |  |  |
Conversion price (dollars per share) | $ / shares |  | $ 17.26 |  |  |  | $ 17.26 |  |  |  |  |  |
Debt instrument maturity date |  | Aug. 15, 2025 |  |  |  |  |  |  |  |  |  |
Conversion premium (as a percent) |  | 30.00% |  |  |  |  |  |  |  |  |  |
Convertible senior notes | 2028 Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Convertible notes Face Value |  |  |  |  | $ 261,000 |  |  |  |  |  |  |
Debt instrument maturity date |  |  |  |  | Mar. 15, 2028 |  |  |  |  |  |  |
Proceeds from issuance of convertible notes, net of issuance costs |  |  |  |  | $ 252,600 |  |  |  |  |  |  |
Common stock price to current conversion price ratio |  |  |  |  | 130.00% |  |  |  |  |  |  |
Average trading price percentage |  |  |  |  | 98.00% |  |  |  |  |  |  |
Ratio of repurchase price to the principal amount |  |  |  |  | 100.00% |  |  |  |  |  |  |
Effective interest rate |  |  |  |  |  | 2.70% |  |  |  |  |  |
Liability component |  |  |  |  |  |  |  |  |  |  |  |
Principal |  |  |  |  |  | $ 261,000 | 261,000 |  |  |  |  |
Debt discount and issuance costs, net |  |  |  |  |  | (6,061) | (7,403) |  |  |  |  |
Net carrying amount |  |  |  |  |  | 254,939 | 253,597 |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  |  | 5,546 | 4,514 |  |  |  |  |
Amortization of debt issuance costs |  |  |  |  |  | 1,342 | 1,061 |  |  |  |  |
Total interest and amortization expense |  |  |  |  |  | 6,888 | 5,575 |  |  |  |  |
Convertible senior notes | 2028 Notes | Privately-negotiated capped call option |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Cap price for the underlying number of shares (in dollars per share) | $ / Item |  |  |  |  | 33.985 |  |  |  |  |  |  |
Purchases of capped calls in connection with convertible senior notes due 2028 |  |  |  |  | $ 21,000 |  |  |  |  |  |  |
Convertible senior notes | 2028 Notes | Over-Allotment Option |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Convertible notes Face Value |  |  |  |  | 45,000 |  |  |  |  |  |  |
Portion of debt instrument face amount, Exercised |  |  |  |  | $ 36,000 |  |  |  |  |  |  |
Convertible senior notes | 2028 Notes | Private Placement |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, annual interest rate |  |  |  |  | 2.125% |  |  |  |  |  |  |
Convertible senior notes | 2028 Notes | Common stock |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate for shares of common stock per $1,000 principal |  |  |  |  | 38.1432 |  |  |  |  |  |  |
Conversion price (dollars per share) | $ / shares |  |  |  |  | $ 26.22 |  |  |  |  |  |  |
Convertible subordinated notes | 2023 Notes |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Convertible notes Face Value |  |  |  | $ 287,500 |  |  |  |  |  |  |  |
Debt Instrument, annual interest rate |  |  |  | 2.125% |  |  |  |  |  |  |  |
Debt Instrument, Repurchased Face Amount | $ 144,800 |  |  |  | $ 144,800 |  |  |  |  |  |  | $ 14,100
Payment for repurchase of debt instrument | 165,600 |  |  |  | $ 165,600 |  |  |  |  |  |  |
Liability component |  |  |  |  |  |  |  |  |  |  |  |
Principal | 96,200 |  |  |  |  | 0 | 96,204 |  | $ 96,200 |  |  |
Debt discount and issuance costs, net | $ (200) |  |  |  |  |  | (11) |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |
Contractual interest expense |  |  |  |  |  | 85 | 2,617 | 5,121 |  |  |  |
Amortization of debt issuance costs |  |  |  |  |  | 11 | 302 | 580 |  |  |  |
Total interest and amortization expense |  |  |  |  |  | $ 96 | $ 2,919 | $ 5,701 |  |  |  |
Convertible subordinated notes | 2023 Notes | Privately-negotiated capped call option |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Cap price for the underlying number of shares (in dollars per share) | $ / Item |  |  | 27.04 | 38 |  |  |  |  |  |  |  |
Convertible subordinated notes | 2023 Notes | Common stock |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate for shares of common stock per $1,000 principal |  |  | 50.5818 | 35.9903 |  |  |  |  |  |  |  |
Conversion price (dollars per share) | $ / shares |  |  | $ 19.77 | $ 27.79 |  |  |  |  |  |  |  |

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