XML 49 R38.htm IDEA: XBRL DOCUMENT v3.19.3
Shareholders' Deficit - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
May 31, 2018
Class of Warrant or Right [Line Items]      
Proceeds upon exercise of stock options and warrants $ 5,034 $ 6,720  
Stock issued from exercise of stock options and warrants (in shares) 513,790 763,575  
Warrants to purchase common stock      
Class of Warrant or Right [Line Items]      
Shares of common stock right to purchase by warrant (in shares)   57,487  
Shares issued from exercise of warrants (in shares)   34,509  
Warrants outstanding 43,115    
CRG Loan | Warrants to purchase common stock      
Class of Warrant or Right [Line Items]      
Warrant exercise price (in USD per share)     $ 23.00
Fair value     $ 1,400
Warrants and Rights Outstanding, Term     5 years
CRG Loan | Warrants to purchase common stock | Maximum      
Class of Warrant or Right [Line Items]      
Shares of common stock right to purchase by warrant (in shares)     200,000