Income Taxes (Details 4)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
U.S. statutory federal income tax rate from the amount of income tax
Taxes at the U.S. statutory rate	34.00%	34.00%
Increase (decrease) resulting from:
Tax credits		39.50%
State income tax	0.70%	(2.50%)
International operations	(21.30%)	(4.90%)
Incentive stock options	1.00%	7.90%
Valuation allowance	(8.30%)	(21.20%)
Transaction costs		(6.10%)
Expiration of state NOLs	22.10%	(14.00%)
Other, net	0.40%	(6.30%)
Total	28.60%	26.40%

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Effective income tax rate reconciliation expiration of NOLs.

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Effective income tax rate reconciliation incentive stock options.

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Transaction costs.

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to changes in the valuation allowance for deferred tax assets.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate recorded during the period.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense or benefit, net of the federal tax benefit (expense) thereon, recorded during the period.

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The sum of the differences between the effective income tax rate and domestic federal statutory income tax rate that can be explained by all tax credits generated or utilized under enacted tax laws during the period.

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