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Stockholders' Equity - (Details) $ / shares in Units, $ in Millions | 1 Months Ended
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Feb. 28, 2018 USD ($) $ / shares shares
Sale of common stock |
Number of shares sold | shares | 3,772,447
Offering price | $ / shares | $ 7.00
Proceeds from stock offering, net of offering costs | $ 24.6
Offering costs | $ 1.8

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