CASH AND CASH EQUIVALENTS (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash and Cash Equivalents [Abstract]
Money market funds	$ 1,036,027	$ 20,978,947
Checking and bank deposits	55,681,820	4,052,333
Total	$ 56,717,847	$ 25,031,280	$ 55,061,329	$ 55,713,784