Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.8.0.1
Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Apr. 30, 2018
Mar. 31, 2017
Subsequent Event [Line Items]    
Aggregate proceeds   $ 43,083
Subsequent event | Common stock    
Subsequent Event [Line Items]    
Number of shares of common stock sold (in shares) 16,000,000  
Share price (in dollars per share) $ 3.90  
Aggregate proceeds $ 58,400