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ORGANIZATION AND PRINCIPAL ACTIVITIES, Reverse, Recapitalization (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) | Dec. 29, 2021 shares
Reverse Recapitalization [Abstract] |  |  |  |
Shares issued (in shares) | 174,853,546 |  |  |
Ordinary shares issued (in shares) | 261,256,254 | 174,853,546 |  |
Ordinary shares outstanding (in shares) | 261,256,254 | 174,853,546 |  |
Cash - NBG | $ | $ 247,382,859 | $ 0 | $ 0 |
Less: transaction costs | $ | (883,300) |  |  |
Net cash contributions from reverse recapitalization | $ | $ 246,499,559 |  |  |
Amended 2016 Plan [Member] |  |  |  |
Reverse Recapitalization [Abstract] |  |  |  |
Ordinary shares, option to purchase (in shares) | 9,225,271 |  |  |
Exchange ratio | 0.71536 |  |  |
CAC [Member] |  |  |  |
Reverse Recapitalization [Abstract] |  |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.001 |  |  |
CEG [Member] |  |  |  |
Reverse Recapitalization [Abstract] |  |  |  |
Common stock, par value (in dollars per share) | $ / shares | $ 0.01 |  |  |
NBG [Member] |  |  |  |
Reverse Recapitalization [Abstract] |  |  |  |
Ordinary shares issued (in shares) | 86,402,708 |  |  | 86,402,708
Ordinary shares outstanding (in shares) | 86,402,708 |  |  | 86,402,708

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