CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities:
Net (loss) income	$ (30,363)us-gaap_ProfitLoss	$ 122us-gaap_ProfitLoss	$ (2,210)us-gaap_ProfitLoss
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation of property, plant and equipment	1,949us-gaap_Depreciation	2,072us-gaap_Depreciation	2,290us-gaap_Depreciation
Amortization of land use right	36acts_AmortizationOfLandUseRight	36acts_AmortizationOfLandUseRight	36acts_AmortizationOfLandUseRight
Amortization of acquired intangible assets	4,991us-gaap_AmortizationOfIntangibleAssets	3,480us-gaap_AmortizationOfIntangibleAssets	3,056us-gaap_AmortizationOfIntangibleAssets
Allowance for doubtful accounts receivable	558us-gaap_ProvisionForDoubtfulAccounts
Write down of inventories	6,160us-gaap_InventoryWriteDown	857us-gaap_InventoryWriteDown	180us-gaap_InventoryWriteDown
Utilization of subsidy from local authorities of Zhuhai, the People's Republic of China (the "PRC")		(1,068)us-gaap_OtherNoncashIncome	(674)us-gaap_OtherNoncashIncome
Loss (gain) on disposal of property, plant and equipment	(1)		5
Loss on disposal of intangible assets	420
Impairment loss recognized in respect of intangible assets	820
Fair value change in trading securities			(2)
Share-based compensation	45us-gaap_ShareBasedCompensation	492us-gaap_ShareBasedCompensation	1,465us-gaap_ShareBasedCompensation
Deferred tax	(3,576)us-gaap_DeferredIncomeTaxExpenseBenefit	279us-gaap_DeferredIncomeTaxExpenseBenefit	454us-gaap_DeferredIncomeTaxExpenseBenefit
Proceeds from disposal of trading securities			459
Share of net (income) loss of equity method investees	(566)	264	(41)
Dividend income from an other investment	(423)	(493)
Impairment recognized in respect of other investments		681	2,543
Changes in operating assets and liabilities:
Accounts receivable	2,349	195	(3,150)
Amount due from a related party	(349)	(961)	(331)
Inventories	(256)us-gaap_IncreaseDecreaseInInventories	(8,678)us-gaap_IncreaseDecreaseInInventories	(4,510)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	(750)	922	(2,549)
Amount due from an equity method investee	(3)	41	(14)
Accounts payable	(173)	(2,198)	3,598
Amount due to a related party	259
Accrued expenses and other current liabilities	(415)	(3,717)	(3,526)
Income tax recoverable	(122)	123	(189)
Income tax payable	1	2	(190)
Rental deposit received (paid)	5	(11)	4
Note Receivables	(161)
Dividend received	425
Net cash used in operating activities	(19,140)	(7,560)	(3,296)
Investing activities:
Purchase of marketable securities	(54,290)	(113,329)	(132,376)
Purchase of property, plant and equipment	(1,156)	(706)	(249)
Investment in an equity method investee	(9,016)	(3,712)	(1,500)
Deposit paid for acquisition of intangible assets	(457)	(145)
Purchase of intangible assets	(8,044)	(4,134)	(1,081)
Proceeds from disposal of property, plant and equipment	20	41	22
(Increase) decrease in time deposit	318	(340)
Increase in restricted deposits	(24,974)us-gaap_IncreaseInRestrictedCash	(16,819)us-gaap_IncreaseInRestrictedCash	(10,000)us-gaap_IncreaseInRestrictedCash
Proceeds from the disposal of intangible assets	24
Proceeds from redemption of marketable securities	159,296	112,966	178,975
Net cash provided by (used in) investing activities	61,721	(26,178)	33,791
Financing activities:
Proceeds from exercise of share-based awards	2,542	3,041	2,289
Advance subsidy from local authorities of Zhuhai, the PRC	232acts_ProceedsFromGovernmentGrant	714acts_ProceedsFromGovernmentGrant	299acts_ProceedsFromGovernmentGrant
Raise of short-term bank loans	31,500us-gaap_ProceedsFromBankDebt	15,000us-gaap_ProceedsFromBankDebt	8,500us-gaap_ProceedsFromBankDebt
Repayment of short-term bank loans	(22,000)us-gaap_RepaymentsOfBankDebt
Repurchase of ordinary shares	(28,902)	(4,853)	(4,152)
Net cash provided by (used in) financing activities	(16,628)	13,902	6,936
Net increase (decrease) in cash and cash equivalents	25,953	(19,836)	37,431
Cash and cash equivalents at the beginning of the year	53,263	71,336	33,207
Effect of exchange rate changes on cash	(1,039)	1,763	698
Cash and cash equivalents at the end of the year	78,177	53,263	71,336
Cash paid during the period for:
Interest	(531)us-gaap_InterestPaid	(498)us-gaap_InterestPaid	(250)us-gaap_InterestPaid
Income taxes		(90)us-gaap_IncomeTaxesPaid	(312)us-gaap_IncomeTaxesPaid
Non-cash investing activities
Purchases of intangible assets	(2,807)	(1,112)	(2,786)
Purchases of property, plant and equipment		$ (156)	$ (898)

This item represents the entity's proportionate share for the period of the undistributed net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment.

No definition available.