v2.4.0.8

SHORT-TERM BANK LOANS (Details) In Thousands, unless otherwise specified |  |  | 1 Months Ended | 12 Months Ended |  |  | 1 Months Ended |  | 1 Months Ended |  | 1 Months Ended | 12 Months Ended |  |  | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Jun. 30, 2012 Loan from bank A in Taiwan [Member] | Apr. 30, 2012 Loan from bank A in Taiwan [Member] | Dec. 31, 2011 Loan from bank A in Taiwan [Member] USD ($) | Dec. 31, 2013 Loan from bank A in Taiwan [Member] | Dec. 31, 2012 Loan from bank A in Taiwan [Member] | Mar. 31, 2013 Loan from bank B in Taiwan [Member] USD ($) | Mar. 31, 2013 Loan from bank B in Taiwan [Member] CNY | Jun. 30, 2013 Loan from bank C in Taiwan [Member] USD ($) | Jun. 30, 2013 Loan from bank C in Taiwan [Member] CNY | Sep. 30, 2013 Loan from bank C in Taiwan [Member] First Tranche [Member] USD ($) | Sep. 30, 2013 Loan from bank C in Taiwan [Member] Second Tranche [Member] USD ($) | May 31, 2011 Loan from bank A in Hong Kong [Member] USD ($) | Dec. 31, 2011 Loan from bank A in Hong Kong [Member] | Dec. 31, 2013 Loan from bank A in Hong Kong [Member] | Dec. 31, 2012 Loan from bank A in Hong Kong [Member] | May 31, 2011 Loan from bank A in Hong Kong [Member] First Tranche [Member] USD ($) | Dec. 31, 2011 Loan from bank A in Hong Kong [Member] First Tranche [Member] | May 31, 2011 Loan from bank A in Hong Kong [Member] Second Tranche [Member] USD ($) | Dec. 31, 2011 Loan from bank A in Hong Kong [Member] Second Tranche [Member] | Dec. 31, 2013 Loan from bank B in Hong Kong [Member] USD ($) | Dec. 31, 2012 Loan from bank B in Hong Kong [Member] USD ($)
Short-term Debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount outstanding |  |  |  |  | $ 6,000 |  |  | $ 5,000 |  | $ 10,000 |  | $ 5,000 | $ 5,000 | $ 6,000 |  |  |  | $ 3,000 |  | $ 3,000 |  | $ 8,500 | $ 8,500
Interest rate spread over LIBOR |  |  | 1.60% | 1.10% | 1.20% |  |  | 1.50% |  | 0.80% |  | 0.80% | 0.80% | 1.10% | 1.90% |  |  |  |  |  |  |  |
Effective interest rate |  |  |  |  |  | 1.94% | 2.08% | 2.08% |  | 1.04% |  |  |  |  | 2.29% | 2.14% | 2.20% |  |  |  |  | 1.15% |
Stated interest rate |  |  |  |  |  |  |  | 3.30% |  | 3.30% |  |  |  |  |  |  |  |  |  |  |  | 1.84% | 1.84%
Debt repayment date |  |  |  |  | May 02, 2013 |  |  | Mar. 24, 2014 |  |  |  | Mar. 05, 2014 | Jan. 28, 2014 |  |  |  |  |  | Feb. 12, 2013 |  | Feb. 19, 2013 | Mar. 31, 2014 | Dec. 31, 2013
Time deposit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500
Restricted deposits | $ 27,161 | $ 10,000 |  |  |  |  |  | $ 5,422 | 32,900 | $ 11,239 | 68,200 |  |  |  |  |  |  |  |  |  |  | $ 2,000 |

X
- Definition Represents the amount of cash that was placed into a time deposit. + References No definition available. + Details
Name: | acts_CashDepositedTimeDeposit
Namespace Prefix: | acts_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_EscrowDeposit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_ShortTermDebtLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, the maximum amount borrowed at any time during the period. + References No definition available. + Details
Name: | us-gaap_ShorttermDebtMaximumAmountOutstandingDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration