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Consolidated Statements of Stockholders' Equity (Parenthetical) | Dec. 31, 2018
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1.625% Convertible Notes |
Debt Instrument [Line Items] |
Percentage of contractual interest rate | 1.625%
Convertible Debt | 1.625% Convertible Notes |
Debt Instrument [Line Items] |
Percentage of contractual interest rate | 1.625%
1.125% Warrants |
Debt Instrument [Line Items] |
Stated interest rate | 1.125%

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