Other Investments (Details) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Other Investments (Additional Textual) [Abstract]
Ownership interest in investment	28.00%		28.00%
Purchase of components under agreement	$ 638,000	$ 2,092,000
Allocation of equity method income (loss)	0	0
Great Wall Semiconductor Corporation (GWS) [Member]
Other Investments (Textual) [Abstract]
Investment in non-voting convertible preferred stock	0		0
Great Wall Semiconductor Corporation (GWS) [Member] | Convertible preferred stock [Member]
Other Investments (Textual) [Abstract]
Investment in non-voting convertible preferred stock	$ 5,000,000		5,000,000