XML 46 R30.htm IDEA: XBRL DOCUMENT v3.19.1
Significant Accounting Policies - Summary of Basic and Diluted Loss per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Numerator    
Net loss $ (28,623) $ (28,024)
Denominator    
Weighted-average common shares outstanding - basic and diluted 22,786,192 18,632,740
Basic and diluted net loss per share $ (1.26) $ (1.50)