Note 2 - Goodwill, Customer Relationships and Other Intangible Assets (Details) - Other Intangible Assets (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 12, 2012	Sep. 29, 2013	Sep. 30, 2012	Mar. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	$ 13,024			$ 13,024		$ 13,054
Weighted Average Estimated Useful Life				10 years
Accumulated Amortization	7,387			7,387		7,064
Amortization Expense	186	194	381	369	381
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	1,987			1,987
Weighted Average Estimated Useful Life				15 years
Accumulated Amortization	602			602
Amortization Expense	33	43		66	79
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	3,571			3,571
Weighted Average Estimated Useful Life				3 years
Accumulated Amortization	3,571			3,571
Amortization Expense		2		2	4
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	454			454
Weighted Average Estimated Useful Life				7 years
Accumulated Amortization	364			364
Amortization Expense	14	14		28	28
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	1,601			1,601
Weighted Average Estimated Useful Life				17 years
Accumulated Amortization	189			189
Amortization Expense	18	14		32	28
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Carrying Amount	5,411			5,411
Weighted Average Estimated Useful Life				12 years
Accumulated Amortization	2,661			2,661
Amortization Expense	$ 121	$ 121		$ 241	$ 242