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Condensed Statements of Convertible Preferred Stock, Common Stock and Stockholders' Deficit (Unaudited) - USD ($)
$ in Thousands
Total
Convertible Preferred Stock [Member]
Common Stock [Member]
Common Stock [Member]
License Agreement [Member]
Additional Paid In Capital [Member]
Accumulated Deficit [Member]
Temporary equity shares beginning at Dec. 31, 2019   2,713,980        
Temporary equity amount beginning at Dec. 31, 2019   $ 8,896        
Shares beginning at Dec. 31, 2019     3,235,671      
Balance beginning at Dec. 31, 2019 $ (9,242)   $ 1   $ 238 $ (9,481)
Stock issued during period shares new issues, amount 200 $ 5,480     200  
Stock issued during period shares new issues, shares   1,533,947 182,500 44,011    
Stock-based compensation expense 18       18  
Net loss (1,691)         (1,691)
Temporary equity shares ending at Mar. 31, 2020   4,247,927        
Temporary equity amount ending at Mar. 31, 2020   $ 14,376        
Shares ending at Mar. 31, 2020     3,462,182      
Balance ending at Mar. 31, 2020 (10,715)   $ 1   456 (11,172)
Temporary equity shares beginning at Dec. 31, 2019   2,713,980        
Temporary equity amount beginning at Dec. 31, 2019   $ 8,896        
Shares beginning at Dec. 31, 2019     3,235,671      
Balance beginning at Dec. 31, 2019 (9,242)   $ 1   238 (9,481)
Stock-based compensation expense 38          
Net loss (4,565)          
Temporary equity shares ending at Jun. 30, 2020   4,247,927        
Temporary equity amount ending at Jun. 30, 2020   $ 14,376        
Shares ending at Jun. 30, 2020     3,462,182      
Balance ending at Jun. 30, 2020 (13,569)   $ 1   476 (14,046)
Temporary equity shares beginning at Mar. 31, 2020   4,247,927        
Temporary equity amount beginning at Mar. 31, 2020   $ 14,376        
Shares beginning at Mar. 31, 2020     3,462,182      
Balance beginning at Mar. 31, 2020 (10,715)   $ 1   456 (11,172)
Stock-based compensation expense 20       20  
Net loss (2,874)         (2,874)
Temporary equity shares ending at Jun. 30, 2020   4,247,927        
Temporary equity amount ending at Jun. 30, 2020   $ 14,376        
Shares ending at Jun. 30, 2020     3,462,182      
Balance ending at Jun. 30, 2020 $ (13,569)   $ 1   476 (14,046)
Temporary equity shares beginning at Dec. 31, 2020 9,993,727 9,993,727        
Temporary equity amount beginning at Dec. 31, 2020 $ 34,900 $ 34,900        
Shares beginning at Dec. 31, 2020     3,764,488      
Balance beginning at Dec. 31, 2020 (16,579)   $ 1   1,458 (18,038)
Stock-based compensation expense 361       361  
Net loss (2,363)         (2,363)
Temporary equity shares ending at Mar. 31, 2021   9,993,727        
Temporary equity amount ending at Mar. 31, 2021   $ 34,900        
Shares ending at Mar. 31, 2021     3,764,488      
Balance ending at Mar. 31, 2021 $ (18,581)   $ 1   1,819 (20,401)
Temporary equity shares beginning at Dec. 31, 2020 9,993,727 9,993,727        
Temporary equity amount beginning at Dec. 31, 2020 $ 34,900 $ 34,900        
Shares beginning at Dec. 31, 2020     3,764,488      
Balance beginning at Dec. 31, 2020 (16,579)   $ 1   1,458 (18,038)
Stock-based compensation expense 753          
Net loss $ (5,413)          
Temporary equity shares ending at Jun. 30, 2021 9,993,727 9,993,727        
Temporary equity amount ending at Jun. 30, 2021 $ 34,900 $ 34,900        
Shares ending at Jun. 30, 2021     3,764,488      
Balance ending at Jun. 30, 2021 (21,239)   $ 1   2,211 (23,451)
Temporary equity shares beginning at Mar. 31, 2021   9,993,727        
Temporary equity amount beginning at Mar. 31, 2021   $ 34,900        
Shares beginning at Mar. 31, 2021     3,764,488      
Balance beginning at Mar. 31, 2021 (18,581)   $ 1   1,819 (20,401)
Stock-based compensation expense 392       392  
Net loss $ (3,050)         (3,050)
Temporary equity shares ending at Jun. 30, 2021 9,993,727 9,993,727        
Temporary equity amount ending at Jun. 30, 2021 $ 34,900 $ 34,900        
Shares ending at Jun. 30, 2021     3,764,488      
Balance ending at Jun. 30, 2021 $ (21,239)   $ 1   $ 2,211 $ (23,451)