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