Quarterly report pursuant to Section 13 or 15(d)

Common Stock Public Offering (Details)

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Common Stock Public Offering (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Feb. 28, 2017
Mar. 31, 2017
Aggregate proceeds   $ 43,083
Common stock    
Number of shares of common stock sold (in shares) 23,000,000  
Share price (in dollars per share) $ 2.00  
Aggregate proceeds $ 43,000