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Long-Term Debt, Interest Rate Swap and Capitalized Lease Obligations (Schedule of Long-term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Long-term debt 47,941us-gaap_LongTermDebt  
Total long term debt 47,941avca_LongTermDebtAndVariableInterestEntityConsolidatedCarryingAmountLongTermDebtAndCapitalLeaseObligationsCurrentAndNonCurrent 52,910avca_LongTermDebtAndVariableInterestEntityConsolidatedCarryingAmountLongTermDebtAndCapitalLeaseObligationsCurrentAndNonCurrent
Less current portion (5,539)us-gaap_LongTermDebtCurrent (4,211)us-gaap_LongTermDebtCurrent
Long-term debt, excluding current maturities 42,402us-gaap_LongTermDebtNoncurrent 48,699us-gaap_LongTermDebtNoncurrent
Long-term debt fixed based on the interest rate swap 6.87%us-gaap_LongTermDebtPercentageBearingFixedInterestRate  
Interest rate swap    
Debt Instrument [Line Items]    
Long-term debt fixed based on the interest rate swap 6.87%us-gaap_LongTermDebtPercentageBearingFixedInterestRate
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember		  
Mortgages | Mortgage loan with a syndicate of banks; issued in March 2011, amended May 2013; payable monthly, interest at 4.5% above LIBOR, a portion of which is fixed at 6.87% based on the interest rate swap described below.    
Debt Instrument [Line Items]    
Long-term debt 43,441us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= avca_MortgageLoanInterestAtFourPointFivePercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MortgagesMember		 44,434us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= avca_MortgageLoanInterestAtFourPointFivePercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MortgagesMember
Mortgages | Mortgage loan with a syndicate of banks; issued in March 2011, amended May 2013; payable monthly, interest at 4.5% above LIBOR, a portion of which is fixed at 6.87% based on the interest rate swap described below. | Interest rate swap    
Debt Instrument [Line Items]    
Long-term debt, interest rate 6.87%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= avca_MortgageLoanInterestAtFourPointFivePercentMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MortgagesMember		  
Mortgages | Mortgage loan with a syndicate of banks; issued in March 2011, amended May 2013; payable monthly, interest at 4.5% above LIBOR, a portion of which is fixed at 6.87% based on the interest rate swap described below. | LIBOR    
Debt Instrument [Line Items]    
Long-term debt, interest rate 4.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= avca_MortgageLoanInterestAtFourPointFivePercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MortgagesMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember		  
Revolving credit facility | Revolving credit facility borrowings payable to a bank; entered into in March 2010; amended in March 2011 and further amended May 2013 and March 2014; secured by receivables of the Company; interest at 4.5% above LIBOR.    
Debt Instrument [Line Items]    
Long-term debt 4,500us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= avca_RevolvingCreditFacilityInterestAtFourPointFivePercentAboveLiborMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember		 3,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= avca_RevolvingCreditFacilityInterestAtFourPointFivePercentAboveLiborMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
Revolving credit facility | Revolving credit facility borrowings payable to a bank; entered into in March 2010; amended in March 2011 and further amended May 2013 and March 2014; secured by receivables of the Company; interest at 4.5% above LIBOR. | LIBOR    
Debt Instrument [Line Items]    
Long-term debt, interest rate 4.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= avca_RevolvingCreditFacilityInterestAtFourPointFivePercentAboveLiborMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember		  
Commercial loan | Commercial loan of consolidated VIE, payable by variable interest entity landlord to a bank; issued in January 2011; payable monthly, fixed interest rate of 5.3% (classified in discontinued operations)    
Debt Instrument [Line Items]    
Long term debt, VIE 0avca_VariableInterestEntityConsolidatedCarryingAmountLongTermDebtAndCapitalLeaseObligationsCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= avca_CommercialLoanOfConsolidatedVariableInterestEntityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember		 $ 5,476avca_VariableInterestEntityConsolidatedCarryingAmountLongTermDebtAndCapitalLeaseObligationsCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= avca_CommercialLoanOfConsolidatedVariableInterestEntityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember
Long-term debt fixed based on the interest rate swap 5.30%us-gaap_LongTermDebtPercentageBearingFixedInterestRate
/ us-gaap_DebtInstrumentAxis
= avca_CommercialLoanOfConsolidatedVariableInterestEntityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LoansPayableMember