XML 17 R27.htm IDEA: XBRL DOCUMENT v3.20.1
Equity, Common Stock (Details) - Common Stock [Member] - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Aug. 31, 2018
Jul. 30, 2018
Common Stock [Abstract]        
Number of shares of common stock sold (in shares) 1,049,382 560,338    
Universal Shelf Registration Statement [Member] | Maximum [Member]        
Common Stock [Abstract]        
Securities offered for sale, aggregate value       $ 100,000
ATM Agreement [Member]        
Common Stock [Abstract]        
Number of shares of common stock sold (in shares) 1,049,382 560,338    
Average sales price per common share (in dollars per share) $ 4.41 $ 5.24    
Aggregate proceeds from sales of common stock $ 4,627 $ 2,936    
Sales commissions, fees and other costs associated with issuance of common stock 139 $ 88    
ATM Agreement [Member] | Maximum [Member]        
Common Stock [Abstract]        
Securities offered for sale, aggregate value $ 21,964   $ 50,000