9876543210 9876543210 2008-01-312008-12-31 local:u1 local:shares
6-K
Concept Label
Concept Value
DerivedPerShareItemTypeConcept
Entity Registrant Name
ng_DerivedPerShareItemTypeConcept_u1_xshares
Document Period End Date
2008-12-31
Amendment Flag
false
Current Fiscal Year End Date
--12-31
Document Type
6-K