Discontinued Operations (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended
	Jun. 30, 2010	Mar. 30, 2014	Mar. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on disposal of business unit		$ (72,000)	$ (92,000)
(Benefit from) provision for income taxes on discontinued operations and dispositions		23,000	(19,000)
Photoflash Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceed from business divestiture	13,500,000
Pre-tax gain (loss) on disposal of business unit		0	124,000
Other Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on disposal of business unit		$ (72,000)	$ (216,000)