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SHARE-BASED COMPENSATION, Share Options (Details) |  |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2021 shares | Apr. 17, 2018 Installment shares | Dec. 31, 2017 $ / shares shares | Aug. 01, 2017 $ / shares shares | May 31, 2016 $ / shares shares | Mar. 07, 2016 $ / shares shares | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Feb. 10, 2016 shares
Share-Based Compensation [Abstract] |  |  |  |  |  |  |  |  |  |
Share-based compensation expenses | $ |  |  |  |  |  |  | $ 1,128,325 | $ 3,364,217 | $ 4,923,509 |
Amended 2016 Plan [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |  |  |  |  |  |  |
Options granted (in shares) | 12,891,130 |  |  |  |  |  |  |  |  |
Exchange ratio | 0.71563 |  |  |  |  |  |  |  |  |
Options converted (in shares) | 9,225,271 |  |  |  |  |  |  |  |  |
Employees and Directors [Member] | 2016 Plan [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |  |  |  |  |  |  |
Shares authorized (in shares) |  | 24,624,157 |  |  |  |  |  |  |  |
Number of additional shares available for issuance (in shares) |  | 10,484,797 |  |  |  |  |  |  |  |
Number of equal annual instalments | Installment |  | 5 |  |  |  |  |  |  |  |
Percentage of each equal annual instalments |  | 20.00% |  |  |  |  |  |  |  |
Options granted (in shares) |  |  | 2,580,000 | 6,300,000 | 650,000 | 12,169,840 |  |  |  |
Exercise price range, lower range limit (in dollars per share) | $ / shares |  |  | $ 1.6500 | $ 1.6500 | $ 0.2000 | $ 0.2000 |  |  |  |
Exercise price range, upper range limit (in dollars per share) | $ / shares |  |  | $ 1.8792 | $ 1.8792 | $ 1.2092 | $ 1.2092 |  |  |  |
Employees and Directors [Member] | 2016 Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |  |  |  |  |  |  |
Options expiration period |  |  |  |  |  |  | 6 years |  |  |
Options contractual term |  |  |  |  |  |  | 6 years |  |  |
Employees and Directors [Member] | 2016 Plan [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  |  |  |  |  |  |  | 14,139,360
Options expiration period |  |  |  |  |  |  | 8 years |  |  |
Options contractual term |  |  |  |  |  |  | 8 years |  |  |

X
- Definition The ratio applied to the option to purchase a number of ordinary shares equal to the aggregate number of shares for which such stock option was exercisable immediately prior to the closing of the Combination multiplied by the Exchange Ratio. + References No definition available. + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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