Property, Plant and Equipment (Details) (USD $)	12 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Apr. 02, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 126,628,000	$ 133,819,000
Less accumulated depreciation	(98,734,000)	(101,716,000)
Property, plant and equipment, net	27,894,000	32,103,000
Depreciation and amortization	9,200,000	12,500,000	10,300,000
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,118,000	3,118,000
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	42,079,000	41,191,000
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	48,269,000	57,277,000
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 33,162,000	$ 32,233,000
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	1 year
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years