| Schedule of Basic and Diluted Earnings Per Share | 
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 Three months ended September 30, 2021 
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 Nine months ended September 30, 2021 
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 Voting common stock 
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 Non-voting common stock 
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 Voting common stock 
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 Non-voting common stock 
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| 
 Basic net loss per share: 
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| 
 Numerator 
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| 
 Allocation of undistributed losses attributable to common stockholders 
 | 
   
 | 
 $ 
 | 
 (9,631 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1,929 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (26,651 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (5,750 
 | 
 ) 
 | 
 
| 
   
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 | 
   
 | 
   
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 | 
   
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 | 
   
 | 
   
 | 
   
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| 
 Denominator 
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 | 
   
 | 
   
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| 
 Weighted average number of shares used in basic per share computation 
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 | 
   
 | 
 21,534,342 
 | 
   
 | 
   
 | 
   
 | 
 4,312,500 
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 | 
   
 | 
   
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 20,389,242 
 | 
   
 | 
   
 | 
   
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 4,398,437 
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 | 
 
| 
 Net loss per share, basic 
 | 
   
 | 
 $ 
 | 
 (0.45 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (0.45 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1.31 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1.31 
 | 
 ) 
 | 
 
| 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
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| 
 Diluted net loss per share: 
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 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
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| 
 Numerator 
 | 
   
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 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
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| 
 Allocation of undistributed losses for basic computation 
 | 
   
 | 
 $ 
 | 
 (9,631 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1,929 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (26,651 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (5,750 
 | 
 ) 
 | 
 
| 
 Reallocation of undistributed losses as a result of conversion of non-voting to voting common shares 
 | 
   
 | 
   
 | 
 (1,929 
 | 
 ) 
 | 
   
 | 
   
 | 
 — 
 | 
   
 | 
   
 | 
   
 | 
 (5,750 
 | 
 ) 
 | 
   
 | 
   
 | 
 — 
 | 
   
 | 
 
| 
 Allocation of undistributed losses 
 | 
   
 | 
 $ 
 | 
 (11,560 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1,929 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (32,401 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (5,750 
 | 
 ) 
 | 
 
| 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
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 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
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 | 
 
| 
 Denominator 
 | 
   
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 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
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| 
 Weighted average number of shares used in basic per share computation 
 | 
   
 | 
   
 | 
 21,534,342 
 | 
   
 | 
   
 | 
   
 | 
 4,312,500 
 | 
   
 | 
   
 | 
   
 | 
 20,389,242 
 | 
   
 | 
   
 | 
   
 | 
 4,398,437 
 | 
   
 | 
 
| 
 Add: conversion of non-voting to voting common shares outstanding 
 | 
   
 | 
   
 | 
 4,312,500 
 | 
   
 | 
   
 | 
   
 | 
 — 
 | 
   
 | 
   
 | 
   
 | 
 4,398,437 
 | 
   
 | 
   
 | 
   
 | 
 — 
 | 
   
 | 
 
| 
 Weighted average number of shares used in diluted per share computation 
 | 
   
 | 
   
 | 
 25,846,842 
 | 
   
 | 
   
 | 
   
 | 
 4,312,500 
 | 
   
 | 
   
 | 
   
 | 
 24,787,679 
 | 
   
 | 
   
 | 
   
 | 
 4,398,437 
 | 
   
 | 
 
| 
 Net loss per share, diluted 
 | 
   
 | 
 $ 
 | 
 (0.45 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (0.45 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1.31 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1.31 
 | 
 ) 
 | 
 
 
 
  
  
  
| 
   
 | 
   
 | 
 Three months ended September 30, 2020 
 | 
   
 | 
   
 | 
 Nine months ended  September 30, 2020 
 | 
   
 | 
 
| 
   
 | 
   
 | 
 Voting common stock 
 | 
   
 | 
   
 | 
 Non-voting common stock 
 | 
   
 | 
   
 | 
 Voting common stock 
 | 
   
 | 
   
 | 
 Non-voting common stock 
 | 
   
 | 
 
| 
 Basic net loss per share: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
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 | 
 
| 
 Numerator 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Allocation of undistributed losses attributable to common stockholders 
 | 
   
 | 
 $ 
 | 
 (6,434 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1,959 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (18,393 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (5,637 
 | 
 ) 
 | 
 
| 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
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 | 
   
 | 
   
 | 
   
 | 
   
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 | 
 
| 
 Denominator 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Weighted average number of shares used in basic per share computation 
 | 
   
 | 
   
 | 
 17,828,169 
 | 
   
 | 
   
 | 
   
 | 
 5,429,486 
 | 
   
 | 
   
 | 
   
 | 
 16,943,599 
 | 
   
 | 
   
 | 
   
 | 
 5,193,114 
 | 
   
 | 
 
| 
 Net loss per share, basic 
 | 
   
 | 
 $ 
 | 
 (0.36 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (0.36 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1.09 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1.09 
 | 
 ) 
 | 
 
| 
   
 | 
   
 | 
   
 | 
   
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 | 
   
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 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Diluted net loss per share: 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Numerator 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Allocation of undistributed losses for basic computation 
 | 
   
 | 
 $ 
 | 
 (6,434 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1,959 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (18,393 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (5,637 
 | 
 ) 
 | 
 
| 
 Reallocation of undistributed losses as a result of conversion of non-voting to voting common shares 
 | 
   
 | 
   
 | 
 (1,959 
 | 
 ) 
 | 
   
 | 
   
 | 
 — 
 | 
   
 | 
   
 | 
   
 | 
 (5,637 
 | 
 ) 
 | 
   
 | 
   
 | 
 — 
 | 
   
 | 
 
| 
 Allocation of undistributed losses 
 | 
   
 | 
 $ 
 | 
 (8,393 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1,959 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (24,030 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (5,637 
 | 
 ) 
 | 
 
| 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Denominator 
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
   
 | 
 
| 
 Weighted average number of shares used in basic per share computation 
 | 
   
 | 
   
 | 
 17,828,169 
 | 
   
 | 
   
 | 
   
 | 
 5,429,486 
 | 
   
 | 
   
 | 
   
 | 
 16,943,599 
 | 
   
 | 
   
 | 
   
 | 
 5,193,114 
 | 
   
 | 
 
| 
 Add: conversion of non-voting to voting common shares outstanding 
 | 
   
 | 
   
 | 
 5,429,486 
 | 
   
 | 
   
 | 
   
 | 
 — 
 | 
   
 | 
   
 | 
   
 | 
 5,193,114 
 | 
   
 | 
   
 | 
   
 | 
 — 
 | 
   
 | 
 
| 
 Weighted average number of shares used in diluted per share computation 
 | 
   
 | 
   
 | 
 23,257,655 
 | 
   
 | 
   
 | 
   
 | 
 5,429,486 
 | 
   
 | 
   
 | 
   
 | 
 22,136,713 
 | 
   
 | 
   
 | 
   
 | 
 5,193,114 
 | 
   
 | 
 
| 
 Net loss per share, diluted 
 | 
   
 | 
 $ 
 | 
 (0.36 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (0.36 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1.09 
 | 
 ) 
 | 
   
 | 
 $ 
 | 
 (1.09 
 | 
 ) 
 | 
 
 
 
  
 |