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9. FIXED ASSETS (Details) (USD $)
Dec. 31, 2014
Sep. 30, 2014
Sep. 30, 2013
Machinery and equipment (2-10 years) $ 297,960us-gaap_MachineryAndEquipmentGross    
Leasehold improvements (5-20 years) 603,612us-gaap_LeaseholdImprovementsGross    
Furniture and fixtures (3-10 years) 178,299us-gaap_FurnitureAndFixturesGross    
Software and websites (3- 7 years) 108,632us-gaap_CapitalizedComputerSoftwareGross    
Less: accumulated depreciation (762,248)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment   (742,676)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property and equipment, net 426,255us-gaap_PropertyPlantAndEquipmentNet 447,236us-gaap_PropertyPlantAndEquipmentNet 447,236us-gaap_PropertyPlantAndEquipmentNet
PurchasedMember      
Machinery and equipment (2-10 years) 210,922us-gaap_MachineryAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= VSUL_PurchasedMember
   
Leasehold improvements (5-20 years) 603,612us-gaap_LeaseholdImprovementsGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= VSUL_PurchasedMember
   
Furniture and fixtures (3-10 years) 77,039us-gaap_FurnitureAndFixturesGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= VSUL_PurchasedMember
   
Software and websites (3- 7 years) 63,783us-gaap_CapitalizedComputerSoftwareGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= VSUL_PurchasedMember
   
Less: accumulated depreciation (533,265)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= VSUL_PurchasedMember
   
Property and equipment, net 422,091us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= VSUL_PurchasedMember
   
CapitalLeaseObligationsMember      
Machinery and equipment (2-10 years) 87,038us-gaap_MachineryAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_CapitalLeaseObligationsMember
   
Leasehold improvements (5-20 years) 0us-gaap_LeaseholdImprovementsGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_CapitalLeaseObligationsMember
   
Furniture and fixtures (3-10 years) 101,260us-gaap_FurnitureAndFixturesGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_CapitalLeaseObligationsMember
   
Software and websites (3- 7 years) 44,849us-gaap_CapitalizedComputerSoftwareGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_CapitalLeaseObligationsMember
   
Less: accumulated depreciation (228,983)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_CapitalLeaseObligationsMember
   
Property and equipment, net $ 4,164us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_CapitalLeaseObligationsMember