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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2019 USD ($)
Proceeds from issuance of common stock,issuance costs | $ 6,981 | $ 18,607
0.375% Convertible Senior Notes due 2024 |  |
Senior convertible notes | 0.375% | 0.375%

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