Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Condensed Statements of Stockholders' (Deficit) Equity (Unaudited) - USD ($)
$ in Thousands
Total
Redeemable Convertible Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Loss
Accumulated Deficit
Note Receivable from Stockholder
Balances at Dec. 31, 2017 $ (109,001)   $ 6,218   $ (115,011) $ (208)
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 and common stock warrants for cash 38     38      
Exercise of common stock options and common stock warrants for cash, Shares     6,619        
Stock-based compensation expense 249     249      
Vesting of early exercised shares 14     14      
Net unrealized loss on available-for- sale securities 0            
Net loss (12,046)         (12,046)  
Balances at Mar. 31, 2018 (120,746)   6,519   (127,057) $ (208)
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        
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 and common stock warrants for cash 42     42      
Exercise of common stock options and common stock warrants for cash, Shares     8,347        
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 loss 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