Acquisition, Goodwill Impairment and Long-lived Asset Impairment (Details Textual) (USD $)	3 Months Ended		9 Months Ended		9 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Sep. 29, 2012	Dec. 31, 2011	Sep. 29, 2012 Maximum [Member]	Sep. 29, 2012 Nanda [Member]	Jun. 30, 2012 Nanda [Member]	Nov. 21, 2011 Nanda [Member]
Acquisition Goodwill Impairment and Long Lived Asset Impairment (Textual) [Abstract]
Preliminary purchase price allocation period					1 year
Acquired percentage of the outstanding shares of Nanda Technologies GmbH								100.00%
Net purchase price in cash								$ 24,600,000
Goodwill acquired							10,800,000
Goodwill balance at period end			11,079,000	11,990,000		11,100,000
Acquisition Goodwill Impairment and Long Lived Asset Impairment (Additional Textual) [Abstract]
Reduction in fair value of royalty payments		600,000	600,000
Reduction in fair value of goodwill	500,000	400,000	400,000
Reduction in fair value of intangible assets		200,000	200,000
Proceeds from escrow	$ 500,000