Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.2
Condensed Consolidated Statements of Changes in Stockholders’ (Deficit) Equity (Unaudited) - USD ($)
$ in Thousands
Total
Common stock
Preferred Stock
Additional paid-in capital
 [1]
Accumulated deficit
Balance at the beginning (in shares) at Dec. 31, 2020   6,250,344 [1] 1,257,143    
Balance at the beginning at Dec. 31, 2020 $ 24,562 $ 6 [1] $ 1 $ 202,345 $ (177,790)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of shares of common stock and pre-funded warrants in underwritten public offering, net (in shares) [1]   1,164,323      
Issuance of shares of common stock and pre-funded warrants in underwritten public offering, net 37,653 $ 1 [1]   37,652  
Conversion of preferred stock to common stock (in shares)   523,810 [1] (1,257,143)    
Conversion of preferred stock to common stock 0 $ 1 [1] $ (1)    
Restricted stock units vested during period (in shares) [1]   6,493      
Shares purchased through employee stock purchase plan (in shares) [1]   7,391      
Shares purchased through employee stock purchase plan 207     207  
Issuance of equity classified warrants related to venture loan and security agreement 861     861  
Exercise of stock options and warrants (in shares) [1]   48,385      
Exercise of stock options and warrants 1,568     1,568  
Stock-based compensation 4,522     4,522  
Net loss (47,785)       (47,785)
Balance at the end (in shares) at Jun. 30, 2021   8,000,746 [1] 0    
Balance at the end at Jun. 30, 2021 21,588 $ 8 [1] $ 0 247,155 (225,575)
Balance at the beginning (in shares) at Mar. 31, 2021   7,425,401 [1] 1,257,143    
Balance at the beginning at Mar. 31, 2021 33,155 $ 7 [1] $ 1 241,617 (208,470)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Conversion of preferred stock to common stock (in shares)   523,810 [1] (1,257,143)    
Conversion of preferred stock to common stock 0 $ 1 [1] $ (1)    
Restricted stock units vested during period (in shares) [1]   6,493      
Shares purchased through employee stock purchase plan (in shares) [1]   7,391      
Shares purchased through employee stock purchase plan 207     207  
Issuance of equity classified warrants related to venture loan and security agreement 861     861  
Exercise of stock options and warrants (in shares) [1]   37,651      
Exercise of stock options and warrants 1,396     1,396  
Stock-based compensation 3,074     3,074  
Net loss (17,105)       (17,105)
Balance at the end (in shares) at Jun. 30, 2021   8,000,746 [1] 0    
Balance at the end at Jun. 30, 2021 21,588 $ 8 [1] $ 0 247,155 (225,575)
Balance at the beginning (in shares) at Dec. 31, 2021 [1]   9,399,517      
Balance at the beginning at Dec. 31, 2021 23,082 $ 9 [1]   285,239 (262,166)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Conversion of preferred stock to common stock (in shares)   523,810      
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     25  
Stock-based compensation 5,980     5,980  
Net loss (35,038)       (35,038)
Balance at the end (in shares) at Jun. 30, 2022 [1]   9,405,724      
Balance at the end at Jun. 30, 2022 (5,951) $ 9 [1]   291,244 (297,204)
Balance at the beginning (in shares) at Mar. 31, 2022 [1]   9,399,517      
Balance at the beginning at Mar. 31, 2022 6,342 $ 9 [1]   290,550 (284,217)
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     25  
Stock-based compensation 669     669  
Net loss (12,987)       (12,987)
Balance at the end (in shares) at Jun. 30, 2022 [1]   9,405,724      
Balance at the end at Jun. 30, 2022 $ (5,951) $ 9 [1]   $ 291,244 $ (297,204)
[1] Results have been retroactively adjusted to reflect the 1-for-12 reverse stock split effected on July 7, 2022.