Balance Sheet Detail (Details) (USD $)	Jun. 29, 2014		Mar. 30, 2014		Jun. 29, 2014 Land	Mar. 30, 2014 Land	Jun. 29, 2014 Machinery and equipment	Mar. 30, 2014 Machinery and equipment	Jun. 29, 2014 Building and leasehold improvements	Mar. 30, 2014 Building and leasehold improvements	May 30, 2014 High-Speed Converter Business	Mar. 30, 2014 High-Speed Converter Business
Inventories, net
Raw materials	$ 6,059,000		$ 7,745,000
Work-in-process	19,359,000		18,436,000
Finished goods	20,331,000		23,441,000
Total inventories, net	45,749,000		49,622,000
Property, plant and equipment, net
Total property, plant and equipment, gross	348,536,000		349,675,000		11,765,000	11,724,000	288,055,000	289,393,000	48,716,000	48,558,000
Less: accumulated depreciation	(282,595,000)		(279,848,000)
Total property, plant and equipment, net	65,941,000	[1]	69,827,000	[1]
Other accrued liabilities
Short-term portion of supplier obligations	793,000	[2]	762,000	[2]
Other	6,952,000	[3]	10,763,000	[3]
Total other accrued liabilities	7,745,000		11,525,000
Other long-term obligations
Deferred compensation related liabilities	14,370,000		13,786,000
Other	4,884,000		4,897,000
Total other long-term liabilities	19,254,000		18,683,000
Fixed assets held for sale											$ 2,900,000	$ 2,900,000

[1] As of March 30, 2014, total property, plant and equipment, net includes the HSC business assets held for sale of $2.9 million. See Note 3 for additional information.

[2] Supplier obligations represent payments due under various software design tool and technology license agreements.

[3] Other current liabilities consist primarily of acquisition related accrued contingent liabilities, accrued royalties and outside commissions, accrued severance costs and other accrued unbilled expenses.