COMPARATIVE INFORMATION (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Cash	$ 13,245,436	$ 4,997,125	$ 1,001,830	$ 21,333,193
Restricted cash - current	6,567,855	5,534,551	3,170,596	52,786,257
Restricted cash - non current	8,927,100	7,392,721	7,753,685	7,558,173
Total cash and restricted cash	$ 28,740,391	$ 17,924,397	$ 11,926,111	$ 81,677,623