Related Parties (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Lite On Semiconductor [Member]
Sales and Purchase Retated Parties [Line Items]
Related Party ownership of common stock	18.00%
Percentage of net sales to related party	0.00%	0.00%
Sales from product from related party	1.00%	3.00%
Revenue from related parties	$ 103,000	$ 47,000
Purchases from related parties	7,509,000	7,418,000
Related party receivable or payable [Abstract]
Accounts receivable	100,000		204,000
Accounts payable	5,731,000		5,308,000
Related Party Transaction, Description of Transaction	LSC owned approximately 18% of the Company’s outstanding Common Stock as of March 31, 2013.
Keylink [Member]
Sales and Purchase Retated Parties [Line Items]
Percentage of net sales to related party	2.00%	3.00%
Sales from product from related party	0.00%	1.00%
Revenue from related parties	3,648,000	4,472,000
Purchases from related parties	1,528,000	1,804,000
Related Party Transaction Consulting Fees From Transactions With Related Party	4,000,000	4,000,000
Related party receivable or payable [Abstract]
Accounts receivable	10,507,000		10,457,000
Accounts payable	$ 4,701,000		$ 5,095,000
Related Party Transaction, Description of Transaction	Keylink is the Company’s 5% joint venture partner in the Company’s Shanghai manufacturing facilities.