CAPITAL STOCK - Warrants (Details) - USD ($)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
CAPITAL STOCK
Outstanding warrants		0	0
Proceeds realized from warrant exercises (in dollars)	$ 8,433,045
Number of warrants exercised	904,886
Exercise price (in dollars per share)	$ 9.32