XML 35 R21.htm IDEA: XBRL DOCUMENT v3.22.1
Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Schedule of Shares Excluded from Computation of Diluted Loss Per Share

         
   As of December 31, 
   2021   2020 
     
Options to acquire common stock   2,827,820    3,166,270 
Warrants to acquire common stock   4,167    193,196 
Convertible preferred stock   9,363,637     
Preferred investment option   11,363,637     
Shares excluded from computation of diluted loss per share   23,559,261    3,359,466