INCOME TAXES - Current and deferred portions of income taxes (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
INCOME TAXES
Current tax expenses	$ 2,859,774	$ 1,706
Deferred tax benefits	(6,215,140)	(1,874,819)	$ (1,183,698)
Income tax benefits	$ (3,355,366)	$ (1,873,113)	$ (1,183,698)

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration