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FAIR VALUE MEASUREMENTS, Level 3 Fair Value Measurements (Details) - shares | Jun. 30, 2021 | Dec. 31, 2020 | Sep. 17, 2020
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Valuation Technique and Input, Description [Abstract] |  |  |
Term | 5 years | 5 years |
Warrant [Member] |  |  |
Valuation Technique and Input, Description [Abstract] |  |  |
Measurement input |  |  | 0.90
Term |  |  | 1 year
Warrant [Member] | Unit price |  |  |
Valuation Technique and Input, Description [Abstract] |  |  |
Measurement input |  |  | 10.00
Warrant [Member] | Strike price |  |  |
Valuation Technique and Input, Description [Abstract] |  |  |
Measurement input |  |  | 11.50
Warrant [Member] | Volatility |  |  |
Valuation Technique and Input, Description [Abstract] |  |  |
Measurement input |  |  | 16.0
Warrant [Member] | Risk free rate |  |  |
Valuation Technique and Input, Description [Abstract] |  |  |
Measurement input |  |  | 0.38
Warrant [Member] | Dividend yield |  |  |
Valuation Technique and Input, Description [Abstract] |  |  |
Measurement input |  |  | 0.0

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- Definition Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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