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Net Loss Per Share (Details) - Schedule of shares outstanding were excluded from the calculation of diluted net loss per ordinary share - shares | 3 Months Ended | 6 Months Ended | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Net Loss Per Share (Details) - Schedule of shares outstanding were excluded from the calculation of diluted net loss per ordinary share [Line Items] |  |  |  |  |  |  |
Shares issuable upon exercise of share options | 210,683 | 42,815 | 212,019 | 42,840 | 114,065 | 50,594 | 55,998
Shares issuable upon vesting of non-vested shares |  |  |  | 1,015 | 450 | 29,401 | 39,262
Shares issuable upon conversion of Series |  |  |  |  |  | 16,304 | 195,653
Shares issuable upon conversion of noncontrolling interests of a subsidiary |  |  |  |  | 107,650 | 107,650 | 67,694
Shares issuable upon conversion of Series B1 Preferred [Member] |  |  |  |  |  |  |
Net Loss Per Share (Details) - Schedule of shares outstanding were excluded from the calculation of diluted net loss per ordinary share [Line Items] |  |  |  |  |  |  |
Shares issuable upon conversion of Series |  |  |  |  |  | 8,137 | 97,642
Shares issuable upon conversion of Series B2 Preferred [Member] |  |  |  |  |  |  |
Net Loss Per Share (Details) - Schedule of shares outstanding were excluded from the calculation of diluted net loss per ordinary share [Line Items] |  |  |  |  |  |  |
Shares issuable upon conversion of Series | 53,319 | 53,319 | 53,319 | 53,319 | 53,319 | 53,319 | 53,319
Shares issuable upon conversion of Series C1 Preferred [Member] |  |  |  |  |  |  |
Net Loss Per Share (Details) - Schedule of shares outstanding were excluded from the calculation of diluted net loss per ordinary share [Line Items] |  |  |  |  |  |  |
Shares issuable upon conversion of Series | 166,950 | 166,950 | 166,950 | 166,950 | 166,950 | 153,038 |
Shares issuable upon conversion of Series C2 Preferred [Member] |  |  |  |  |  |  |
Net Loss Per Share (Details) - Schedule of shares outstanding were excluded from the calculation of diluted net loss per ordinary share [Line Items] |  |  |  |  |  |  |
Shares issuable upon conversion of Series | 126,345 | 126,345 | 126,345 | 126,345 | 126,345 | 115,816 |
Shares issuable upon conversion of Series EEL/D1 Preferred [Member] |  |  |  |  |  |  |
Net Loss Per Share (Details) - Schedule of shares outstanding were excluded from the calculation of diluted net loss per ordinary share [Line Items] |  |  |  |  |  |  |
Shares issuable upon conversion of Series | 139,186 | 139,186 | 139,186 | 139,186 | 139,186 | 139,186 | 139,186
Shares issuable upon conversion of Series D2 Preferred [Member] |  |  |  |  |  |  |
Net Loss Per Share (Details) - Schedule of shares outstanding were excluded from the calculation of diluted net loss per ordinary share [Line Items] |  |  |  |  |  |  |
Shares issuable upon conversion of Series | 102,512 | 102,512 | 102,512 | 102,512 | 102,512 | 102,512 | 17,085

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