XML 85 R71.htm IDEA: XBRL DOCUMENT v3.19.1
Private Placement - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Aug. 06, 2018
Dec. 31, 2018
Dec. 31, 2017
Equity [Abstract]      
Number of shares issued (in shares) 12,062,000    
Number of additional shares from warrants (in shares) 4,221,700    
Gross proceeds $ 19,700    
Initial exercise price of warrants (in dollars per share) $ 2.52    
Stock issuance costs $ 500 $ 500 $ 0