FOLLOW-ON EQUITY OFFERINGS (Details) - USD ($)	1 Months Ended	12 Months Ended
Feb. 28, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
America depositary shares (ADSs) issued, shares	1,540,000
Follow-on equity offering, net of issuance costs, shares	38,500,000
Issuance cost for ordinary shares	$ 2,000,000			$ 2,033,041
Follow-on equity offering, net of issuance costs	$ 28,000,000			$ 27,996,959

The cash outflow for cost incurred directly with the issuance of an equity security.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

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