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(LOSS) / INCOME PER SHARE - Shares Excluded From the Calculation of Diluted Loss Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share options
Shares excluded from the calculation of diluted loss per share
Shares excluded from the calculation of diluted loss per share	204,700	619,650	890,500
Nonvested shares
Shares excluded from the calculation of diluted loss per share
Shares excluded from the calculation of diluted loss per share	460,000	548,780	1,084,284
Convertible promissory notes
Shares excluded from the calculation of diluted loss per share
Shares excluded from the calculation of diluted loss per share		88,883,116	0

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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