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Redeemable Convertible Preferred Stock and Stockholders' Equity - Warrants (Details) - Underwriters warrants - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Jan. 31, 2020
Warrants      
Number of warrants issued     100,000
Exercise price     $ 7.50
Percentage of exercise price to the share offering price     125.00%
Warrant term     5 years
Number of warrants converted in a non-cash transaction 97,600    
Warrants outstanding 2,400 100,000