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Net Loss per Share Attributable to Common Stockholders - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($)
 3 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Jun. 30, 2020
Numerator:        
Net loss   $ (36,080,000) $ (24,278,000)  
Reduction of Series A' redeemable convertible preferred stock liquidation value   0 228,000  
Net loss attributable to common stockholders   $ (36,080,000) $ (24,050,000)  
Denominator:        
Weighted-average common stock outstanding used to compute basic and basic net loss per share (in shares)   16,608,800 204,068  
Weighted-average common stock outstanding used to compute basic and diluted net loss per share (in shares)   16,608,800 204,068  
Net loss per share attributable to common stockholders, basic (in dollars per share)   $ (2.17) $ (117.85)  
Net loss per share attributable to common stockholders, diluted (in dollars per share)   $ (2.17) $ (117.85)  
Liquidation Value   $ 0 $ 227,755,000  
Extinguishment gain in accumulated deficit   $ 0 $ 228,000  
Convertible Preferred Stock        
Numerator:        
Reduction of Series A' redeemable convertible preferred stock liquidation value $ 200,000      
Denominator:        
Liquidation Value 58.175     $ 116.350
Extinguishment gain in accumulated deficit $ 200,000