Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment (Details)

v2.4.1.9
Property, Plant and Equipment (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Total Property, plant and equipment $ 3,901,219us-gaap_PropertyPlantAndEquipmentGross $ 3,901,219us-gaap_PropertyPlantAndEquipmentGross
Less: accumulated depreciation (3,192,292)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (3,156,814)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, plant and equipment, net 708,927us-gaap_PropertyPlantAndEquipmentNet 744,405us-gaap_PropertyPlantAndEquipmentNet
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total Property, plant and equipment 2,094,316us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
2,094,316us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
Airspace [Member]    
Property, Plant and Equipment [Line Items]    
Total Property, plant and equipment 865,076us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= nwmh_AirspaceMember
865,076us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= nwmh_AirspaceMember
Transportation Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total Property, plant and equipment 561,240us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_TransportationEquipmentMember
561,240us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_TransportationEquipmentMember
Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total Property, plant and equipment 306,372us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember
306,372us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember
Office furniture and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total Property, plant and equipment 2,117us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OfficeEquipmentMember
2,117us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OfficeEquipmentMember
Land Fill Area [Member]    
Property, Plant and Equipment [Line Items]    
Total Property, plant and equipment $ 72,098us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= nwmh_LandFillAreaMember
$ 72,098us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= nwmh_LandFillAreaMember