CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OPERATING EXPENSES:
Exploration and evaluation	$ 137	$ 546
General and administrative expense	1,508	1,362
TOTAL OPERATING EXPENSES	1,645	1,908
LOSS FROM OPERATIONS	(1,645)	(1,908)
OTHER INCOME/(EXPENSE):
Interest expense	(288)	(249)
TOTAL OTHER (EXPENSE)/INCOME, NET	(288)	(249)
LOSS BEFORE INCOME TAXES	(1,933)	(2,157)
CONSOLIDATED NET LOSS	(1,933)	(2,157)
Less: Net loss attributable to CRNCI	10	4
NET LOSS ATTRIBUTABLE TO GMI	$ (1,923)	$ (2,153)
Basic and diluted net loss attributable to GMI per share of common stock (in dollars per share)	$ (0.02)	$ (0.02)
Weighted average number of shares outstanding - basic and diluted (in shares)	111,087	110,356
COMPREHENSIVE LOSS	$ (1,923)	$ (2,153)