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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income (loss) $ (22,730) $ (35,579) $ 11,777
Adjustments to reconcile net income (loss) to net cash used in operating activities:      
Depreciation and amortization 3,464 3,951 3,082
Amortization of deferred gain on sale-leaseback     (625)
Net loss (gain) on divestitures 1,307 16,239 (4,546)
Net loss (gain) on disposal of assets 3,553 879 (492)
Gain on CTA recognition from liquidation of subsidiaries (7,088)    
Tax provision reversal (1,240)    
Equity pick up of losses of an associate 9,586    
Investment Impairment 9,400 3,043 476
Stock-based compensation expense 1,698 2,982 3,029
Provision for (recovery of) doubtful accounts (75) (1,154) 2,212
Deferred income taxes (380) (2,211) 345
Changes in operating assets and liabilities, net of effect of iTV deconsolidation and IPTV divestiture      
Accounts receivable (14,058) 664 8,080
Inventories and deferred costs 45,875 (4,231) 94,916
Other assets 6,058 17,455 11,261
Accounts payable 7,110 9,506 (4,857)
Income taxes payable 110 6,393 3,102
Customer advances (12,005) 9,749 1,488
Deferred revenue (29,524) (37,760) (132,575)
Other liabilities (2,976) (15,544) (38,390)
Net cash used in operating activities (1,915) (25,618) (41,717)
CASH FLOWS FROM INVESTING ACTIVITIES:      
Additions to property, plant and equipment (3,766) (5,445) (9,347)
Purchase of intangible assets   (54)  
Payment on the NGN divestiture (2,369)    
Net proceeds from divestitures 2,000 220 215
Payment for the non-controlling interest in the liquidation of a subsidiary (898)    
Proceeds from settlement of an investment interest, net 569    
Change in restricted cash 2,209 (1,129) 5,478
Purchase of investment interests (26,592) (15,602) (1,181)
Contribution of equity investment through a shareholder loan     (7,119)
Purchase of short-term investments (81) (2,267) (8,365)
Proceeds from sale of short-term investments 379 4,300 9,039
Cash decrease due to deconsolidation of a subsidiary   (6,841)  
Payment on divestiture of IPTV business and investment in IPTV convertible bond (503) (56,010)  
Other 162 80 519
Net cash used in investing activities (28,890) (82,748) (10,761)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Issuance of ordinary shares upon ESPP purchases and option exercises     124
Repurchase of ordinary shares (30,680) (8,842) (6,301)
Net cash used in financing activities (30,680) (8,842) (6,177)
Effect of exchange rate changes on cash and cash equivalents (10,326) (4,834) 8,774
Net decrease in cash and cash equivalents (71,811) (122,042) (49,881)
Cash and cash equivalents at beginning of year 179,584 301,626 351,507
Cash and cash equivalents at end of year 107,773 179,584 301,626
Cash paid:      
Interest 151 240 252
Income taxes 1,600 3,000 530
Non-cash operating activities      
Purchase of iTV convertible bond through converting of outstanding receivables 7,114    
Non-cash investing activities      
Repurchase of ordinary share from iTV shareholder   (5,278)  
Accrual related to purchase of property, plant and equipment 530 1,911 (2,475)
Purchase of iTV convertible bond through converting of outstanding receivables $ (7,114)