XML 103 R84.htm IDEA: XBRL DOCUMENT v3.19.3
Subsequent Events - Initial Public Offering (Details) - USD ($)
$ / shares in Units, $ in Thousands
Oct. 29, 2019
Sep. 30, 2018
Subsequent Event [Line Items]    
Share price (in dollars per share)   $ 1.49
Subsequent Event | IPO    
Subsequent Event [Line Items]    
Number of shares issued and sold (in shares) 6,700,000  
Share price (in dollars per share) $ 13.00  
Net proceeds after deducting underwriters’ discounts, commissions, and offering costs $ 77,700  
Underwriters’ discounts and commissions 5,900  
Offering costs $ 3,500  
Shares of common stock converted from Series A and B convertible preferred stock (in shares) 65,428,088  
Conversion basis (in shares) 1  
Subsequent Event | IPO | Additional Paid in Capital    
Subsequent Event [Line Items]    
Reclassification of temporary equity to permanent equity $ 106,200  
Subsequent Event | IPO | Common Stock    
Subsequent Event [Line Items]    
Reclassification of temporary equity to permanent equity $ 7  
Subsequent Event | Selling Shareholders, Including Over-Allotment Option    
Subsequent Event [Line Items]    
Number of shares issued and sold (in shares) 4,800,000  
Subsequent Event | Over-Allotment Option    
Subsequent Event [Line Items]    
Number of shares issued and sold (in shares) 1,500,000