Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Changes in Stockholders??? Deficit (Unaudited)

v3.23.2
Condensed Consolidated Statements of Changes in Stockholders’ Deficit (Unaudited) - USD ($)
Total
Common stock
Additional paid-in capital
Accumulated deficit
Balance at the beginning (in shares) at Dec. 31, 2021 [1]   9,399,517    
Balance at the beginning at Dec. 31, 2021 $ 23,082,000 $ 9,000 [1] $ 285,239,000 [1] $ (262,166,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Restricted stock units vested during period (in shares) [1]   938    
Shares purchased through employee stock purchase plan (in shares) [1]   5,269    
Shares purchased through employee stock purchase plan 25,000   25,000 [1]  
Stock-based compensation 5,980,000   5,980,000 [1]  
Net loss (35,038,000)     (35,038,000)
Balance at the end (in shares) at Jun. 30, 2022 [1]   9,405,724    
Balance at the end at Jun. 30, 2022 (5,951,000) $ 9,000 [1] 291,244,000 [1] (297,204,000)
Balance at the beginning (in shares) at Mar. 31, 2022 [1]   9,399,517    
Balance at the beginning at Mar. 31, 2022 6,342,000 $ 9,000 [1] 290,550,000 [1] (284,217,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Restricted stock units vested during period (in shares) [1]   938    
Shares purchased through employee stock purchase plan (in shares) [1]   5,269    
Shares purchased through employee stock purchase plan 25,000   25,000 [1]  
Stock-based compensation 669,000   669,000 [1]  
Net loss (12,987,000)     (12,987,000)
Balance at the end (in shares) at Jun. 30, 2022 [1]   9,405,724    
Balance at the end at Jun. 30, 2022 (5,951,000) $ 9,000 [1] 291,244,000 [1] (297,204,000)
Balance at the beginning (in shares) at Dec. 31, 2022   9,430,535    
Balance at the beginning at Dec. 31, 2022 (10,915,000) $ 9,000 292,900,000 (303,824,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of shares of common stock and warrants in underwritten public offering, net (in shares)   3,770,000    
Issuance of shares of common stock and warrants in underwritten public offering, net 13,748,000 $ 4,000 13,744,000  
Issuance of common shares pursuant to ATM Program, net (in shares)   2,044,672    
Issuance of common shares pursuant to ATM Program, net 6,531,000 $ 2,000 6,529,000  
Retirement of common shares in exchange for pre-funded warrants (in shares)   (1,300,000)    
Retirement of common shares in exchange for pre-funded warrants (3,640,000) $ (1,000) (3,873,000) 234,000
Issuance of pre-funded warrants in exchange for retirement of common shares 3,640,000   3,640,000  
Exercise of pre-funded warrants for common shares (in shares)   $ 72,110    
Shares purchased through employee stock purchase plan (in shares)   19,623    
Shares purchased through employee stock purchase plan 67,000   67,000  
Stock-based compensation 1,748,000   1,748,000  
Net loss (18,148,000)     (18,148,000)
Balance at the end (in shares) at Jun. 30, 2023   14,036,940    
Balance at the end at Jun. 30, 2023 (6,969,000) $ 14,000 314,755,000 (321,738,000)
Balance at the beginning (in shares) at Mar. 31, 2023   13,200,535    
Balance at the beginning at Mar. 31, 2023 (6,267,000) $ 13,000 307,499,000 (313,779,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Issuance of common shares pursuant to ATM Program, net (in shares)   2,044,672    
Issuance of common shares pursuant to ATM Program, net 6,531,000 $ 2,000 6,529,000  
Retirement of common shares in exchange for pre-funded warrants (in shares)   (1,300,000)    
Retirement of common shares in exchange for pre-funded warrants (3,640,000) $ (1,000) (3,873,000) 234,000
Issuance of pre-funded warrants in exchange for retirement of common shares 3,640,000   3,640,000  
Exercise of pre-funded warrants for common shares (in shares)   $ 72,110    
Shares purchased through employee stock purchase plan (in shares)   19,623    
Shares purchased through employee stock purchase plan 67,000   67,000  
Stock-based compensation 893,000   893,000  
Net loss (8,193,000)     (8,193,000)
Balance at the end (in shares) at Jun. 30, 2023   14,036,940    
Balance at the end at Jun. 30, 2023 $ (6,969,000) $ 14,000 $ 314,755,000 $ (321,738,000)
[1] Amounts for prior periods presented have been retroactively adjusted to reflect the 1-for-12 reverse stock split effected on July 7, 2022. See Note 2 for details.