Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 years	Dec. 31, 2010 years	Dec. 31, 2009
Unrecognized tax benefits, interest and penalties	$ 30,000
Effective tax rate due by recognizing tax benefits	300,000
Tax payment in settlement of valuation of certain intangible assets			2,600,000
Foreign tax rate difference	(2,910,000)	(1,866,000)	(1,977,000)
Tax holiday granted by Singapore economic development board, duration in years		4
Tax holiday granted by Singapore economic development board, extension duration in years	6
Income tax holiday, aggregate dollar amount	300,000	700,000	1,100,000
Income tax holiday, income tax benefits per share	$ 0.02	$ 0.04	$ 0.07
Deferred tax assets, domestic	4,957	4,564
Deferred income tax assets, net operating loss carryforwards	14,939	14,084
Valuation Allowance, Amount	11,760	11,148
Valuation Allowance, Deferred Tax Asset, Change in Amount		1,200,000
Deferred Tax Liabilities, Undistributed Foreign Earnings	50,800,000	38,400,000
Maximum [Member]
Deferred tax assets operating loss carryforwards expiration period	15
Minimum [Member]
Deferred tax assets operating loss carryforwards expiration period	5
Switzerland [Member]
Foreign tax rate difference	$ 900,000	$ 200,000	$ 1,200,000
Gain on foreign income tax rate differential, per shares	$ 0.05	$ 0.01	$ 0.07