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Debt Obligations (Schedule Of Debt Obligations) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Short-term debt $ 325us-gaap_ShortTermBorrowings $ 10,126us-gaap_ShortTermBorrowings
Capital leases and other borrowings 295us-gaap_LongTermDebtNoncurrent 297us-gaap_LongTermDebtNoncurrent
Total debt obligations 620us-gaap_DebtLongtermAndShorttermCombinedAmount 10,423us-gaap_DebtLongtermAndShorttermCombinedAmount
Capital Leases And Other Borrowings [Member]    
Debt Instrument [Line Items]    
Short-term debt 325us-gaap_ShortTermBorrowings
/ us-gaap_DebtInstrumentAxis
= altv_CapitalLeasesAndOtherBorrowingsMember
428us-gaap_ShortTermBorrowings
/ us-gaap_DebtInstrumentAxis
= altv_CapitalLeasesAndOtherBorrowingsMember
TriState Capital Bank [Member]    
Debt Instrument [Line Items]    
Short-term debt   $ 9,698us-gaap_ShortTermBorrowings
/ us-gaap_DebtInstrumentAxis
= altv_TristateCapitalBankMember