Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Details)

v3.20.1
Subsequent Events - Additional Information (Details) - USD ($)
$ in Thousands
2 Months Ended 12 Months Ended
Jun. 25, 2018
Mar. 11, 2020
Dec. 31, 2019
Dec. 31, 2018
Subsequent Event [Line Items]        
Common stock offerings, net, shares 1,955,000      
Proceeds from common stock offerings, net $ 32,780   $ 23,851 $ 32,770
Equity Distribution Agreement [Member]        
Subsequent Event [Line Items]        
Proceeds from common stock offerings, net     $ 24,373  
Subsequent Event [Member] | Equity Distribution Agreement [Member]        
Subsequent Event [Line Items]        
Common stock offerings, net, shares   1,292,208    
Proceeds from common stock offerings, net   $ 2,984    
Commissions costs   $ 92