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MAINLAND CHINA PROFIT APPROPRIATION AND RESTRICTION ON CAPITAL REPATRIATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
MAINLAND CHINA PROFIT APPROPRIATION AND RESTRICTION ON CAPITAL REPATRIATION [Abstract]
Minimum annual appropriations to general reserve fund, as a percent of after-tax profits.	10.00%
Balance of PRC subsidiaries reserves	$ 14,764	$ 14,299
Restricted capital and reserves	$ 113,970	$ 113,505

X

- Definition

Statutory Reserves Disclosure [Abstract]

+ References

No definition available.

+ Details

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X

- Definition

The minimum required appropriations to the general reserve fund required by the PRC, as a percentage of after-tax profits.

+ References

No definition available.

+ Details

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Namespace Prefix:	acts_
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X

- Definition

Total assets that cannot be used for operating purposes because of contract or regulatory requirements that are in effect for a period that extends beyond one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Balance Type:	debit
Period Type:	instant

X

- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 09
-Article 12

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