Annual report pursuant to Section 13 and 15(d)

STATEMENTS OF STOCKHOLDERS' EQUITY

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STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2019   99,416    
Beginning balance at Dec. 31, 2019 $ 29,147 $ 10 $ 70,774 $ (41,637)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of common stock from exercise of stock options (in shares)   613    
Issuance of common stock from exercise of stock options 175   175  
Issuance of common stock under equity commitment (in shares)   635    
Issuance of common stock under equity commitment 293   293  
Stock-based compensation 3,881   3,881  
Net loss (22,284)     (22,284)
Ending balance (in shares) at Dec. 31, 2020   100,664    
Ending balance at Dec. 31, 2020 11,212 $ 10 75,123 (63,921)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of common stock from exercise of stock options (in shares)   2    
Issuance of common stock from exercise of stock options 0      
Issuance of common stock under equity commitment (in shares)   10,022    
Issuance of common stock under equity commitment 4,407 $ 1 4,406  
Issuance of common stock from note conversion (in shares)   1,794    
Issuance of common stock from note conversion 268   268  
Stock-based compensation 3,210   3,210  
Net loss (15,554)     (15,554)
Ending balance (in shares) at Dec. 31, 2021   112,482    
Ending balance at Dec. 31, 2021 $ 3,543 $ 11 $ 83,007 $ (79,475)