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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Common Stock
Contractors
Grantee Status - Contractors or Consultants
Common Stock
Grantee Status - Employees
Common Stock
Additional Paid-in Capital
Employees
Grantee Status - Employees
Additional Paid-in Capital
Contractors
Grantee Status - Contractors or Consultants
Additional Paid-in Capital
Grantee Status - Employees
Additional Paid-in Capital
Grantee Status - Contractors or Consultants
Additional Paid-in Capital
Accumulated Deficit
Contractors
Grantee Status - Contractors or Consultants
Accumulated Deficit
Grantee Status - Employees
Accumulated Deficit
Accumulated Other Comprehensive Income
Contractors
Grantee Status - Contractors or Consultants
Accumulated Other Comprehensive Income
Grantee Status - Employees
Accumulated Other Comprehensive Income
Employees
Grantee Status - Employees
Contractors
Grantee Status - Contractors or Consultants
Grantee Status - Employees
Grantee Status - Contractors or Consultants
Total
Balance at Dec. 31, 2020     $ 140,733         $ 49,234     $ (162,140)     $ 1,243         $ 29,070
Balance (in shares) at Dec. 31, 2020     26,003                                
Stock options issued $ 0 $ 0     $ 9 $ 587     $ 0 $ 0   $ 0 $ 0     $ 9 $ 587    
Net loss                     (4,733)               (4,733)
Balance at Mar. 31, 2021     $ 140,733         49,830     (166,873)     1,243         24,933
Balance (in shares) at Mar. 31, 2021     26,003                                
Balance at Dec. 31, 2020     $ 140,733         49,234     (162,140)     1,243         29,070
Balance (in shares) at Dec. 31, 2020     26,003                                
Net loss                                     (12,919)
Balance at Sep. 30, 2021     $ 140,780         52,049     (175,059)     1,243         19,013
Balance (in shares) at Sep. 30, 2021     26,007                                
Balance at Mar. 31, 2021     $ 140,733         49,830     (166,873)     1,243         24,933
Balance (in shares) at Mar. 31, 2021     26,003                                
Stock options issued       $ 1,326                     $ 1,326        
Exercise of stock options     $ 47         (24)                     23
Exercise of stock options (in shares)     4                                
Net loss                     (4,001)               (4,001)
Balance at Jun. 30, 2021     $ 140,780         51,132     (170,874)     1,243         22,281
Balance (in shares) at Jun. 30, 2021     26,007                                
Stock options issued           917                     917    
Net loss                     (4,185)               (4,185)
Balance at Sep. 30, 2021     $ 140,780         52,049     (175,059)     1,243         19,013
Balance (in shares) at Sep. 30, 2021     26,007                                
Balance at Dec. 31, 2021     $ 140,801         53,214     (179,486)     1,243         15,772
Balance (in shares) at Dec. 31, 2021     26,014                                
Stock options issued $ 0 $ 0     $ 34 399     $ 0 $ 0   $ 0 $ 0     $ 34 399    
Exercise of stock options     $ 31         (16)                     $ 15
Exercise of stock options (in shares)     26                               26
Net loss                     (3,696)               $ (3,696)
Balance at Mar. 31, 2022     $ 140,832         53,631     (183,182)     1,243         12,524
Balance (in shares) at Mar. 31, 2022     26,040                                
Balance at Dec. 31, 2021     $ 140,801         53,214     (179,486)     1,243         15,772
Balance (in shares) at Dec. 31, 2021     26,014                                
Net loss                                     (16,857)
Balance at Sep. 30, 2022     $ 141,309         56,593     (196,343)     1,243         2,802
Balance (in shares) at Sep. 30, 2022     26,238                                
Balance at Mar. 31, 2022     $ 140,832         53,631     (183,182)     1,243         12,524
Balance (in shares) at Mar. 31, 2022     26,040                                
Stock options issued           1,008 $ 35                   1,008 $ 35  
Exercise of stock options     $ 90         (44)                     $ 46
Exercise of stock options (in shares)     19                               19
Restricted stock unit release (in shares)     8                                
Net loss                     (5,072)               $ (5,072)
Balance at Jun. 30, 2022     $ 140,922         54,630     (188,254)     1,243         8,541
Balance (in shares) at Jun. 30, 2022     26,067                                
Stock options issued           $ 1,853 $ 34                   $ 1,853 $ 34  
Exercise of stock options     $ 387         (199)                     $ 188
Exercise of stock options (in shares)     151                               151
Restricted stock unit release     $ 20         (166)                     $ (166)
Warrants issued to Petrichor               441                     441
Net loss                     (8,089)               (8,089)
Balance at Sep. 30, 2022     $ 141,309         $ 56,593     $ (196,343)     $ 1,243         $ 2,802
Balance (in shares) at Sep. 30, 2022     26,238