Business Combinations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011	Jul. 19, 2012 NXP B.V [Member]		Apr. 30, 2012 Fox Enterprise [Member]	Apr. 16, 2012 Alvand Technologies [Member]	Jul. 19, 2012 Developed Technology Rights [Member] NXP B.V [Member]	Apr. 30, 2012 Developed Technology Rights [Member] Fox Enterprise [Member]	Jul. 19, 2012 Noncompete Agreements [Member] NXP B.V [Member]	Apr. 16, 2012 Noncompete Agreements [Member] Alvand Technologies [Member]	Jul. 19, 2012 Backlog [Member] NXP B.V [Member]	Apr. 16, 2012 Backlog [Member] Alvand Technologies [Member]	Jul. 19, 2012 Customer Relationships [Member] NXP B.V [Member]	Apr. 30, 2012 Customer Relationships [Member] Fox Enterprise [Member]	Jul. 19, 2012 In Process Research and Development [Member] NXP B.V [Member]	Apr. 30, 2012 In Process Research and Development [Member] Fox Enterprise [Member]
Business Acquisition
Business Acquisition, Pro Forma Revenue	$ 133,449	$ 138,734	$ 263,963	$ 288,605
Acquired Finite-lived Intangible Asset, Amount									7,500	7,900					2,700	2,000	1,900	900
Purchase price allocation
Cash							1,080	147
Accounts receivable					4,000		4,053	211
Inventories					252		2,600
Prepaid expenses and other current assets							363	124
Property, plant and equipment, net					1,125		656	15
Defined Benefit Plan, Assets for Plan Benefits	1,000		1,000		666	[1]
Defined Benefit Plan, Benefit Obligation	(700)		(700)		(666)	[1]
Accounts payable and accrued expenses							(3,765)	(707)
Other long term assets							1,190
Other long term liabilities					435		(1,516)
Long term deferred tax liability							(4,345)
Amortizable intangible assets					12,500		12,300				300	2,300	100	1,500
Goodwill					13,720		16,305	19,712
Total purchase price					27,162		28,921	23,302
Business Acquisition, Pro Forma Net Income (Loss)	$ 346	$ 1,163	$ (4,361)	$ 6,465
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic	$ 0.00	$ 0.01	$ (0.03)	$ 0.04
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted	$ 0.00	$ 0.01	$ (0.03)	$ 0.04

[1] See Note 16 for information regarding pension plans adopted.