Note 6 - Goodwill and Intangible Assets (Details) - Changes in the Carrying Amount of Goodwill (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
Dec. 28, 2014	Mar. 30, 2014
Changes in the Carrying Amount of Goodwill [Abstract]
Beginning balance	$ 30,410us-gaap_Goodwill	$ 10,356us-gaap_Goodwill
Goodwill additions	14,461us-gaap_GoodwillPeriodIncreaseDecrease	20,054us-gaap_GoodwillPeriodIncreaseDecrease
Ending balance	$ 44,871us-gaap_Goodwill	$ 30,410us-gaap_Goodwill

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant