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Stockholders' equity (Tables)
9 Months Ended
Sep. 30, 2022
Stockholders' Equity Note [Abstract]  
Schedule for Number of Common Stock Reserved for Exercise of Outstanding Stock Options and Warrants
As of September 30, 2022 and December 31, 2021, there were 12,418,052 and 9,199,512, respectively, shares of common stock reserved for the exercise of outstanding stock options, restricted stock units ("RSUs") and warrants.
September 30,
2022
December 31,
2021
Stock options10,524,780 8,342,429 
Restricted stock units1,870,682 817,609 
Warrants22,590 39,474 
12,418,052 9,199,512