Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements of Stockholders' (Deficit) Equity (Unaudited)

v3.19.2
Condensed Statements of Stockholders' (Deficit) Equity (Unaudited) - USD ($)
$ in Thousands
Total
Redeemable Convertible Preferred Stock
Common Stock
Note Receivable from Stockholder
Additional Paid-In Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Balances at Dec. 31, 2017 $ (109,001)   $ (208) $ 6,218   $ (115,011)
Temporary Equity Balance, Shares at Dec. 31, 2017   173,750,421          
Temporary Equity Balance at Dec. 31, 2017   $ 102,505          
Common Stock Balance, Shares at Dec. 31, 2017     465,330        
Exercise of common stock options 38       38    
Stock-based compensation expense 249       249    
Vesting of early exercised shares 14       14    
Net loss (12,046)           (12,046)
Balances at Mar. 31, 2018 (120,746)   (208) 6,519   (127,057)
Temporary Equity Balance, Shares at Mar. 31, 2018   173,750,421          
Temporary Equity Balance at Mar. 31, 2018   $ 102,505          
Common Stock Balance, Shares at Mar. 31, 2018     471,949        
Exercise of common stock options, Shares     6,619        
Balances at Dec. 31, 2017 (109,001)   (208) 6,218   (115,011)
Temporary Equity Balance, Shares at Dec. 31, 2017   173,750,421          
Temporary Equity Balance at Dec. 31, 2017   $ 102,505          
Common Stock Balance, Shares at Dec. 31, 2017     465,330        
Net unrealized gain on available-for- sale securities 0            
Net loss (23,587)            
Balances at Jun. 30, 2018 (132,019)     (208) 6,787   (138,598)
Temporary Equity Balance, Shares at Jun. 30, 2018   173,750,421          
Temporary Equity Balance at Jun. 30, 2018   $ 135,720          
Common Stock Balance, Shares at Jun. 30, 2018     479,377        
Balances at Dec. 31, 2017 (109,001)   (208) 6,218   (115,011)
Temporary Equity Balance, Shares at Dec. 31, 2017   173,750,421          
Temporary Equity Balance at Dec. 31, 2017   $ 102,505          
Common Stock Balance, Shares at Dec. 31, 2017     465,330        
Balances at Dec. 31, 2018 131,539   $ 23   281,891 $ (47) (150,328)
Common Stock Balance, Shares at Dec. 31, 2018     22,848,184        
Balances at Mar. 31, 2018 (120,746)   (208) 6,519   (127,057)
Temporary Equity Balance, Shares at Mar. 31, 2018   173,750,421          
Temporary Equity Balance at Mar. 31, 2018   $ 102,505          
Common Stock Balance, Shares at Mar. 31, 2018     471,949        
Issuance of Series E redeemable convertible preferred stock, net of issuance costs   $ 33,215          
Exercise of common stock options 36       36    
Stock-based compensation expense 232       232    
Net unrealized gain on available-for- sale securities 0            
Net loss (11,541)           (11,541)
Balances at Jun. 30, 2018 (132,019)     $ (208) 6,787   (138,598)
Temporary Equity Balance, Shares at Jun. 30, 2018   173,750,421          
Temporary Equity Balance at Jun. 30, 2018   $ 135,720          
Common Stock Balance, Shares at Jun. 30, 2018     479,377        
Exercise of common stock options, Shares     7,428        
Balances at Dec. 31, 2018 131,539   $ 23   281,891 (47) (150,328)
Common Stock Balance, Shares at Dec. 31, 2018     22,848,184        
Exercise of common stock options 42   $ 8,347   42    
Issuance of common stock under Employee Stock Purchase Plan 671       671    
Issuance of common stock under Employee Stock Purchase Plan, Shares     68,910        
Stock-based compensation expense 2,286       2,286    
Net unrealized gain on available-for- sale securities 103         103  
Adoption of new accounting standards at Mar. 31, 2019 10,327           10,327
Net loss (14,250)           (14,250)
Balances at Mar. 31, 2019 130,718   $ 23   284,890 56 (154,251)
Common Stock Balance, Shares at Mar. 31, 2019     22,925,441        
Balances at Dec. 31, 2018 131,539   $ 23   281,891 (47) (150,328)
Common Stock Balance, Shares at Dec. 31, 2018     22,848,184        
Net unrealized gain on available-for- sale securities 260            
Net loss (28,043)            
Balances at Jun. 30, 2019 119,555   $ 23   287,363 213 (168,044)
Common Stock Balance, Shares at Jun. 30, 2019     22,927,203        
Balances at Mar. 31, 2019 130,718   $ 23   284,890 56 (154,251)
Common Stock Balance, Shares at Mar. 31, 2019     22,925,441        
Exercise of common stock options 10   $ 1,762   10    
Stock-based compensation expense 2,463       2,463    
Net unrealized gain on available-for- sale securities 157         157  
Net loss (13,793)           (13,793)
Balances at Jun. 30, 2019 $ 119,555   $ 23   $ 287,363 $ 213 $ (168,044)
Common Stock Balance, Shares at Jun. 30, 2019     22,927,203