v2.4.1.9
INCOME TAXES (Schedule of Effective Income Tax Rate Reconciliation) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
INCOME TAXES [Abstract]      
PRC tax rate 25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Tax (credit) provision at PRC enterprise income tax rate $ (8,181)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ 197us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ (370)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Expenses not deductible for tax purpose 3,701us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther 403us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther 1,224us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther
Share-based compensation not deductible for tax purpose 11us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost 123us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost 366us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Income not taxable for tax purposes (5,146)us-gaap_IncomeTaxReconciliationTaxExemptIncome (1,005)us-gaap_IncomeTaxReconciliationTaxExemptIncome (599)us-gaap_IncomeTaxReconciliationTaxExemptIncome
Net change in valuation allowance 4,299us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 1,682us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 1,623us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Effect of tax exemption and preferential income tax rate granted to PRC subsidiaries 3,857us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate (930)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate (911)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate
Effect of the different income tax rates in other jurisdictions 301us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential 204us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential 21us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Effect of withholding tax on undistributed earnings (762)us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings 400us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings 349us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings
Effect of withholding tax on American Depository Shares ("ADS") reimbursement income       150acts_IncomeTaxReconciliationAmericanDepositorySharesReimbursement
Utilization of tax loss previously not recognized    (685)us-gaap_IncomeTaxReconciliationDeductionsOther (979)us-gaap_IncomeTaxReconciliationDeductionsOther
Overprovision in prior year (90)us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes (78)us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes (81)us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes
Others 214us-gaap_IncomeTaxReconciliationOtherAdjustments 92us-gaap_IncomeTaxReconciliationOtherAdjustments (21)us-gaap_IncomeTaxReconciliationOtherAdjustments
Total income tax expense $ (1,796)us-gaap_IncomeTaxExpenseBenefit $ 403us-gaap_IncomeTaxExpenseBenefit $ 772us-gaap_IncomeTaxExpenseBenefit