Retirement Plans - 401(k) (Details) - USD ($)	12 Months Ended
Mar. 26, 2017	Mar. 27, 2016	Mar. 29, 2015
Retirement Plans
Defined contribution plan expense	$ 621,600	$ 635,500	$ 524,200
Common stock shares included in plan assets (in shares)	145,205

The amount of the cost recognized during the period for defined contribution plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration