v3.19.3

STOCKHOLDERS' EQUITY - Common Stock and Warrants Narrative (Details) $ / shares in Units, $ in Thousands |  |  | 9 Months Ended |
--- | --- | --- | --- | ---
May 25, 2018 USD ($) $ / shares shares | Mar. 06, 2017 USD ($) $ / shares shares | Sep. 30, 2019 USD ($) vote $ / shares shares | Sep. 30, 2018 USD ($) | Dec. 31, 2018 $ / shares shares
Class of Stock [Line Items] |  |  |  |  |
Proceeds from issuance of warrants | $ |  |  | $ 0 | $ 112,125 |
Common Stock Warrant |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Warrants to purchase aggregate shares of capital stock (in shares) | 11,100,000 | 19,200,000 |  |  |
Warrants, weighted average exercise price (in USD per share) | $ / shares | $ 109.26 | $ 31.18 |  |  |
Proceeds from issuance of warrants | $ | $ 112,100 | $ 57,200 |  |  |
Number of warrants exercised (in shares) |  |  | 0 |  |
Class A |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Common stock, number of votes entitled for each share held (in votes) | vote |  |  | 1 |  |
Common stock, shares authorized (in shares) |  |  | 1,000,000,000 |  | 1,000,000,000
Common stock, par value (in USD per share) | $ / shares |  |  | $ 0.0000001 |  | $ 0.0000001
Common stock, shares outstanding (in shares) |  |  | 346,552,092 |  | 323,546,864
Class B |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Common stock, number of votes entitled for each share held (in votes) | vote |  |  | 10 |  |
Common stock, shares authorized (in shares) |  |  | 500,000,000 |  | 500,000,000
Common stock, par value (in USD per share) | $ / shares |  |  | $ 0.0000001 |  | $ 0.0000001
Common stock, shares outstanding (in shares) |  |  | 82,521,716 |  | 93,501,142

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