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Note 15 - Subsequent Events (Details) (USD $)
Dec. 31, 2014
Sep. 23, 2014
Feb. 28, 2015
Note 15 - Subsequent Events (Details) [Line Items]      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share) $ 0.53us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 $ 0.53us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1  
Subsequent Event [Member] | Second Tranche [Member] | September 2014 Term Loan [Member]      
Note 15 - Subsequent Events (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 500,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= vivmf_September2014TermLoanMember
/ us-gaap_DebtInstrumentAxis
= vivmf_SecondTrancheMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Subsequent Event [Member] | Third Tranche [Member] | September 2014 Term Loan [Member]      
Note 15 - Subsequent Events (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 1,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= vivmf_September2014TermLoanMember
/ us-gaap_DebtInstrumentAxis
= vivmf_ThirdTrancheMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Subsequent Event [Member]      
Note 15 - Subsequent Events (Details) [Line Items]      
Percent of Outstanding Loan Amount     1.00%vivmf_PercentOfOutstandingLoanAmount
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per share)     $ 0.53us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember