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Capitalization - Warrants (Details) - Common stock | Dec. 31, 2018 $ / shares shares
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Period One |
Warrants |
Warrant shares (in shares) | shares | 7,030
Exercise price (in dollars per share) | $ / shares | $ 128.00
Period Five |
Warrants |
Warrant shares (in shares) | shares | 130
Exercise price (in dollars per share) | $ / shares | $ 2,520.00

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