Fair Value Measurement (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Investments in Non-marketable Equity Securities- eTurbo Touch Technology Inc.	$ 12,688	$ 19,426
Impairment loss on investment	1,299	0	0
Eturbotouch Technology Inc [Member]
Investments in Non-marketable Equity Securities- eTurbo Touch Technology Inc.	477
Impairment loss on investment	238
Fair Value, Inputs, Level 1 [Member] \| Eturbotouch Technology Inc [Member]
Investments in Non-marketable Equity Securities- eTurbo Touch Technology Inc.	0
Fair Value, Inputs, Level 2 [Member] \| Eturbotouch Technology Inc [Member]
Investments in Non-marketable Equity Securities- eTurbo Touch Technology Inc.	0
Fair Value, Inputs, Level 3 [Member] \| Eturbotouch Technology Inc [Member]
Investments in Non-marketable Equity Securities- eTurbo Touch Technology Inc.	$ 477

This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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+ Details

- Definition

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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+ Details