Annual report pursuant to Section 13 and 15(d)

Public Offering of Common Stock - Public Offering (Details)

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Public Offering of Common Stock - Public Offering (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2019
Public Offering of Common Stock      
Shares of common stock sold 38,900,875   39,589,755
Par value of common stock $ 0.01   $ 0.01
Net proceeds from issuance of common stock $ 132,964 $ 15,891  
Offering expenses paid $ 257 $ 228