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Consolidated Balance Sheets (Parenthetical) - USD ($)
Sep. 30, 2021
Jun. 30, 2021
Apr. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
May 31, 2015
Temporary equity, par value (in dollars per share) $ 0.001       $ 0.001       $ 0.001    
Common stock, par value (in dollars per share) $ 0.001   $ 0.001   $ 0.001       $ 0.001    
Total shares authorized (in shares) 120,000,000   120,000,000   30,000,000       30,000,000   30,000,000
Common stock, shares issued (in shares) 348,531       331,789       324,145    
Common stock, shares outstanding (in shares) 348,531       331,789       324,145    
Series A Preferred Stock                      
Temporary equity, par value (in dollars per share) $ 0.001   $ 0.001                
Temporary equity issued (in shares) 2,212,543       210,715            
Temporary equity outstanding (in shares) 2,212,543 2,212,543   1,508,633 210,715 83,707 20,926 0 0 0  
Temporary equity, liquidation preference $ 15,858,181       $ 1,510,342            
Series Seed Preferred Stock                      
Temporary equity, par value (in dollars per share) $ 0.001   $ 0.001                
Temporary equity issued (in shares) 2,624,324       2,624,324            
Temporary equity outstanding (in shares) 2,624,324 2,624,324   2,624,324 2,624,324 2,624,324 2,624,324 0 0 0  
Temporary equity, liquidation preference $ 11,796,713       $ 11,796,713            
Redeemable Common Stock                      
Temporary equity issued (in shares) 16,666       16,666       16,666    
Temporary equity outstanding (in shares) 16,666 16,666   16,666 16,666 16,666 16,666 16,666 16,666 16,666