Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Changes in Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit)

v3.21.1
Consolidated Statements of Changes in Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Other Comprehensive Loss
Beginning balance at Dec. 31, 2018 $ 5,377        
Beginning balance (in shares) at Dec. 31, 2018 6,000        
Increase (Decrease) in Temporary Equity [Roll Forward]          
Series A convertible preferred stock redeemed for cash $ (5,377)        
Series A convertible preferred stock redeemed for cash (in shares) (6,000)        
Ending balance at Dec. 31, 2019 $ 0        
Ending balance (in shares) at Dec. 31, 2019 0        
Beginning balance at Dec. 31, 2018 $ 5,827 $ 3 $ 118,062 $ (111,820) $ (418)
Beginning balance (in shares) at Dec. 31, 2018   27,253,000      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options, net of vesting of restricted shares 287   287    
Exercise of stock options, net of vesting of restricted shares (in shares)   506,000      
Vesting of restricted stock units (in shares)   45,000      
Exercise of common stock warrants for cash 6,184   6,184    
Exercise of common stock warrants for cash (in shares)   617,000      
Exercise of common stock warrants pursuant to cashless provisions 0 $ 1 (1)    
Exercise of common stock warrants pursuant to cashless provisions (in shares)   10,913,000      
Series A convertible preferred stock redeemed for cash (863)   (863)    
Waiver of sponsor promissory note originally issued in conjunction with reverse merger 1,993   1,993    
Stock-based compensation expense 1,784   1,784    
Reacquisition of equity component of Senior Convertible Note 0        
Equity classified cash conversion feature of Senior Convertible Note 0        
Cumulative translation adjustment 36       36
Issuance of common stock for payment of legal, earned bonus and board of director fees 562   562    
Issuance of common stock for payment of bonus and legal fees (in shares)   477,000      
Net loss (12,871)     (12,871)  
Ending balance at Dec. 31, 2019 4,026 $ 4 128,008 (123,604) (382)
Ending balance (in shares) at Dec. 31, 2019   39,811,000      
Ending balance at Dec. 31, 2020 $ 0        
Ending balance (in shares) at Dec. 31, 2020 0        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of stock options, net of vesting of restricted shares $ 99   99    
Exercise of stock options, net of vesting of restricted shares (in shares)   188,000      
Vesting of restricted stock units (in shares)   1,631,000      
Issuance of common stock for payment of legal, earned bonus, and board of director fees 1,283   1,283    
Issuance of common stock for payment of legal, earned bonus, and board of director fees (in shares)   1,348,000      
Sales of common stock, net of issuance costs 9,178 $ 1 9,177    
Sale of common stock, net of issuance costs (in shares)   11,629,160      
Stock-based compensation expense 4,492   4,492    
Issuance of common stock upon partial conversions of Senior Convertible Note 2,267 $ 1 2,266    
Issuance of common stock upon partial conversions of Senior Convertible Note (in shares)   1,763,675      
Reacquisition of equity component of Senior Convertible Note (1,388)   (1,388)    
Equity classified cash conversion feature of Senior Convertible Note 219   219    
Cumulative translation adjustment 44       44
Net loss (22,199)     (22,199)  
Ending balance at Dec. 31, 2020 $ (1,979) $ 6 $ 144,156 $ (145,803) $ (338)
Ending balance (in shares) at Dec. 31, 2020   56,371,000