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Net Loss Per Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Voting Common Stock |  |
Basic net loss per share: |  |
Allocation of undistributed losses attributable to common stockholders | $ (25,090) | $ (17,693)
Weighted average number of shares used in basic per share computation | 17,417,900 | 4,345,530
Net loss per share, basic | $ (1.44) | $ (4.07)
Diluted net loss per share: |  |
Allocation of undistributed losses for basic computation | $ (25,090) | $ (17,693)
Reallocation of undistributed losses as a result of conversion of non-voting to voting common shares | (8,249) | (4,576)
Allocation of undistributed losses | $ (33,339) | $ (22,269)
Weighted average number of shares used in basic per share computation | 17,417,900 | 4,345,530
Add: Conversion of non-voting to voting common shares outstanding | 5,727,327 | 1,123,861
Weighted average number of shares used in diluted per share computation | 23,145,227 | 5,469,391
Net loss per share, diluted | $ (1.44) | $ (4.07)
Non-voting Common Stock |  |
Basic net loss per share: |  |
Allocation of undistributed losses attributable to common stockholders | $ (8,249) | $ (4,576)
Weighted average number of shares used in basic per share computation | 5,727,327 | 1,123,861
Net loss per share, basic | $ (1.44) | $ (4.07)
Diluted net loss per share: |  |
Allocation of undistributed losses for basic computation | $ (8,249) | $ (4,576)
Allocation of undistributed losses | $ (8,249) | $ (4,576)
Weighted average number of shares used in basic per share computation | 5,727,327 | 1,123,861
Weighted average number of shares used in diluted per share computation | 5,727,327 | 1,123,861
Net loss per share, diluted | $ (1.44) | $ (4.07)

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