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Income Taxes (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Income Taxes [Abstract] |  |  |
Non-U.S. income included in income (loss) before tax | $ 16,700,000 | $ 16,300,000 | $ 22,000,000
Current [Abstract] |  |  |
Federal | 0 | 0 | 0
State | 13,000 | (113,000) | 259,000
Foreign | 175,000 | 966,000 | 2,536,000
Total current | 188,000 | 853,000 | 2,795,000
Deferred [Abstract] |  |  |
Federal | 0 | 0 | 0
State | 0 | 0 | 0
Total deferred | 0 | 0 | 0
Total net provision for income taxes | 188,000 | 853,000 | 2,795,000
Reconciliation of effective income tax rates and U.S. statutory federal income tax rate [Abstract] |  |  |
Statutory federal income tax rate (in hundredths) | 35.00% | 35.00% | 35.00%
State income taxes, net of federal tax benefits (in hundredths) | (0.10%) | (1.00%) | 0.60%
Change in valuation allowance (in hundredths) | (111.80%) | 23.30% | (11.50%)
Stock compensation (in hundredths) | (1.40%) | 1.50% | 0.30%
Foreign rate differences (in hundredths) | 85.30% | (72.50%) | (17.10%)
Dividend from PRC investee (in hundredths) | (19.60%) | 30.10% | 3.20%
Net loss from privately-held PRC investments (in hundredths) | 2.50% | (2.60%) | (0.70%)
Other (in hundredths) | 7.30% | (1.60%) | 0.00%
Effective tax rate (in hundredths) | (2.80%) | 12.20% | 9.80%
Deferred tax assets [Abstract] |  |  |
Net operating loss | 51,818,000 | 44,155,000 |
Accruals and reserves not yet deductible | 4,985,000 | 5,389,000 |
Credits | 1,488,000 | 1,488,000 |
Deferred tax assets, gross | 58,291,000 | 51,032,000 |
Deferred tax liabilities [Abstract] |  |  |
Valuation of investment portfolio | (288,000) | 0 |
Total deferred tax liabilities | (288,000) | 0 |
Net deferred tax assets | 58,003,000 | 51,032,000 |
Valuation allowance | (58,003,000) | (51,032,000) |
Net deferred tax assets | 0 | 0 |
Operating Loss Carryforwards [Line Items] |  |  |
(Increase) and decrease in valuation allowance | 7,000,000 | 1,500,000 |
Change in cumulative ownership percentage (in hundredths) | 50.00% |  |
Period with in which cumulative ownership change | 3 years |  |
Unrecognized tax benefits interest and penalties | 0 |  |
Unrecognized tax benefits accrued interest and penalties | 0 |  |
Unrecognized tax liabilities of undistributed earnings of foreign subsidiaries | 57,700,000 |  |
Restricted cash and investments | 18,700,000 |  |
Reconciliation of beginning and ending amount of the gross unrecognized tax benefits [Roll Forward] |  |  |
Gross unrecognized tax benefits balance at December 31, 2012 | 16,403,000 |  |
Additions based on tax positions related to the current year | 0 |  |
Additions for tax positions of prior years | 0 |  |
Gross unrecognized tax benefits balance at December 31, 2013 | 16,403,000 | 16,403,000 |
Unrecognized tax benefit would favorably impact the effective tax rate in future periods if recognized | 16,400,000 |  |
Minimum [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards, expiration period | Dec. 31, 2017 |  |
Maximum [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards, expiration period | Dec. 31, 2022 |  |
Federal [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | 153,900,000 |  |
Tax credit carryforwards | 1,500,000 |  |
Tax credit carryforward, expiration period | Dec. 31, 2019 |  |
State [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Operating loss carryforwards | $ 43,500,000 |  |

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