STOCK BASED COMPENSATION - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Apr. 26, 2017	Feb. 13, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
STOCK BASED COMPENSATION
Stock options granted (in shares)			338,000	645,000
Exercise price of options granted (in dollars per share)			$ 2.99	$ 3.99
Exercisable period of options			2 years 2 months 12 days
Number of common stock reserved for issuance			17,500,000
Number of shares of common stock reserved for issuance			5,283,137	5,294,563
Common stock issued			337,051,000	299,570,000
Shares
Balance at the beginning of the period (in shares)			4,720,000	6,954,000
Granted (in shares)			338,000	645,000
Exercised (in shares)			(94,000)	(1,457,000)
Forfeited (in shares)			(37,000)	(1,422,000)
Expired (in shares)			(21,000)
Balance at the end of the period (in shares)			4,906,000	4,720,000	6,954,000
Exercisable at the end of the period (in shares)			3,438,000
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per share)			$ 2.41	$ 2.49
Granted (in dollars per share)			2.99	3.99
Exercised (in dollars per share)			$ 1.30	$ 2.48
Proceeds from exercise of stock options			$ 121	$ 3,730
Forfeited (in dollars per share)			$ 4.28	$ 3.45
Expired (in dollars per share)			5.00
Balance at the end of the period (in dollars per share)			2.45	$ 2.41	$ 2.49
Exercisable (in dollars per share)			$ 2.48
Weighted Average Remaining Contractual Life
Outstanding at the end of the period			2 years 7 months 6 days	3 years 4 months 24 days	4 years 1 month 6 days
Exercisable period of options			2 years 2 months 12 days
Intrinsic Value
Outstanding at the beginning of the period (in dollars)			$ 4,388	$ 98
Exercised (in dollars)			87	1,601
Outstanding at the end of the period (in dollars)			2,564	$ 4,388	$ 98
Exercisable at the end of the period (in dollars)			$ 1,686
Granted (in shares)			338,000	645,000
Equity Incentive Plan
STOCK BASED COMPENSATION
Common stock issued			94,000	1,494,085
Weighted Average Exercise Price
Exercised (in dollars per share)			$ 1.30	$ 2.51
Proceeds from exercise of stock options			$ 100	$ 3,700
Maximum
STOCK BASED COMPENSATION
Maximum number of shares that may be subject to grants of options to an individual in a calendar year			1,000,000
Lexam
STOCK BASED COMPENSATION
Share replacement awards	$ 100
Common Stock Exchange Ratio For Acquisition		0.056%
Certain employees and directors
STOCK BASED COMPENSATION
Stock options granted (in shares)			300,000	600,000	2,700,000
Exercise price of options granted (in dollars per share)			$ 2.99	$ 3.99	$ 1.03
Shares
Granted (in shares)			300,000	600,000	2,700,000
Weighted Average Exercise Price
Granted (in dollars per share)			$ 2.99	$ 3.99	$ 1.03
Intrinsic Value
Granted (in shares)			300,000	600,000	2,700,000
Vesting period of options			3 years
Exercise period of options			5 years