Bank Credit Agreements and Other Short-Term and Long-Term Debt (Long Term Debt) (Details)	12 Months Ended
	Dec. 31, 2011 USD ($)	Dec. 31, 2011 TWD	Dec. 31, 2010 USD ($)
Long-term debt by current and noncurrent [Abstract]
Total long-term debt	$ 3,265,000		$ 3,811,000
Current portion of long-term debt	(408,000)		(418,000)
Long-term borrowings	2,857,000		3,393,000
Long term debt other disclosures [Abstract]
Long-term Debt, Gross		158,000,000
Long-term variable interest rate	3.30%	3.30%	2.00%
Debt Instrument, Maturity Date, Description	TWD 132 million matures on July 6, 2021, and TWD 26 million matures July 6, 2013	TWD 132 million matures on July 6, 2021, and TWD 26 million matures July 6, 2013