CAPITAL STOCK - Shares (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) Vote $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares
CAPITAL STOCK
Preferred Shares, shares authorized	2,000,000	2,000,000	2,000,000
Preferred Shares, shares issued	0	0	0
Preferred Shares, shares outstanding	0	0	0
Common Shares, shares authorized	120,000,000	120,000,000	120,000,000
Common Shares, par value (in dollars per share) | $ / shares	$ 0	$ 0	$ 0
Common Shares, shares outstanding	51,527,711	51,501,877	50,284,007
Share Issuances related to Equity Compensation:
Shares issued upon exercise of stock options by employees	25,834	657,998	711,516
Proceeds realized from stock option exercises (in dollars) | $	$ 80,161	$ 2,780,188	$ 2,964,445
Average exercise price of options exercised (in dollars per share) | $ / shares	$ 3.10	$ 4.23	$ 4.17
Restricted Stock Grants (in shares)		850,000	740,000
Share issuances related to Warrant Exercises
Shares issued upon the exercise of warrants			904,886
Proceeds realized from warrant exercises (in dollars) | $			$ 8,433,045
Share issuances related to Equity Offerings
Shares issued pursuant to equity offerings			7,816,944
Proceeds realized from equity offerings (in dollars) | $			$ 69,780,967
Share issuances in Exchange for Services
Number of votes per common share | Vote	1