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Summary of Significant Accounting Policies - Follow-On Public Offering (Details) - Follow-on Offering
$ / shares in Units, $ in Millions
Apr. 16, 2020
USD ($)
$ / shares
shares
Subsidiary, Sale of Stock [Line Items]  
Shares sold (in shares) | shares 2,300,000
Sale of stock, price per share (in dollars per share) | $ / shares $ 58.00
Proceeds from sale of stock | $ $ 124.7