Other Divestitures (not accounted as discontinued operations) (Details) (USD $)	0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended	0 Months Ended
	Dec. 13, 2013	Dec. 29, 2013	Jul. 12, 2013	Sep. 29, 2013	Mar. 07, 2013
Assets of Audio Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from sale (including amounts held in escrow)	$ 200,000
Maximum contingent consideration	1,000,000
Estimate of fair value of transitional services agreement	0
Total consideration	1,200,000
Fair value adjustment to contingent consideration	(1,000,000)
Fair value adjustment to transitional services agreement	(300,000)
Less book value of assets sold and direct costs related to the sale:
Fixed assets	(135,000)
Inventories	(3,051,000)
Other assets	(304,000)
Transaction and other costs	(126,000)
Gain (loss) on divestiture	(3,716,000)	(3,400,000)
PCI Express
Less book value of assets sold and direct costs related to the sale:
Fixed assets			(1,312,000)
Inventories			(876,000)
Goodwill allocation			(7,323,000)
Transaction and other costs			(4,239,000)
Gain (loss) on divestiture			82,349,000	82,300,000
Cash deposit received from divestiture of business			96,099,000
Smart Meter business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds from sale (including amounts held in escrow)					10,264,000
Less book value of assets sold and direct costs related to the sale:
Fixed assets					(22,000)
Inventories					(1,299,000)
Transaction and other costs					(957,000)
Gain (loss) on divestiture					7,986,000
Escrow deposits related to property sales					$ 1,000,000
Holding period for escrow deposit					1 year