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SHARE-BASED PAYMENT - Schedule of Effective Time Fair Value of the Stock Options was Determined Using the BLM (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Number of Shares |  |
Number of shares, outstanding at beginning (in shares) | 33,503,657 |
Number on non-vested shares, grant (in shares) | 2,900,000 |
Number of shares, forfeited (in shares) | (312,586) |
Number of shares, outstanding at ending (in shares) | 36,091,071 | 33,503,657
Number of shares, expected to vest and exercisable (in shares) | 36,091,071 |
Number of shares, exercisable (in shares) | 11,875,830 |
Weighted Average Exercise Price (US$) |  |
Weighted average exercise price, outstanding at beginning (in dollars per share) | $ 6.19 |
Weighted average grant date fair value per share, non-vested shares, grant (in dollars per share) | 4.81 |
Weighted average exercise price, forfeited (in dollars per share) | 6.28 |
Weighted average exercise price, outstanding at ending (in dollars per share) | 6.08 | $ 6.19
Weighted average exercise price, expected to vest and exercisable (in dollars per share) | 6.08 |
Weighted average exercise price, exercisable (in dollars per share) | 6.20 |
Weighted Average Grant Date Fair Value (US$) |  |
Weighted average grant date fair value, outstanding at beginning (in dollars per share) | 4.95 |
Weighted average grant date fair value, granted (in dollars per share) | 2.69 |
Weighted average grant date fair value, forfeited (in dollars per share) | 4.87 |
Weighted average grant date fair value, outstanding at ending (in dollars per share) | 4.80 | $ 4.95
Weighted average grant date fair value, expected to vest and exercisable (in dollars per share) | 4.80 |
Weighted average grant date fair value, exercisable (in dollars per share) | $ 5.00 |
Weighted Average Remaining Contractual |  |
Weighted average remaining contractual, outstanding | 6 years 9 months 18 days | 7 years 10 months 24 days
Weighted average remaining contractual life, expected to vest and exercisable | 6 years 9 months 18 days |
Weighted average remaining contractual life, exercisable | 7 years |

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- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Expected To Vest And Exercisable, Weighted Average Grant Date Fair Value + References No definition available. + Details
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- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Weighted Average Grant Date Fair Value + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, 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 (e)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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