LIQUIDITY - Schedule of Liquidity (Details)	3 Months Ended
Mar. 31, 2017
LIQUIDITY.
POS-Mineral's continued contribution to all other costs of project (as a percent)	20.00%

Represents the contribution percentage in all other costs incurred by the LLC.

No definition available.

Name:	gmo_ContributionPercentageInAllOtherCosts
Namespace Prefix:	gmo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration