Summary of Significant Accounting Policies (Accumulated Other Comprehensive Income) (Details) - USD ($)	Mar. 30, 2019	Mar. 31, 2018	Apr. 01, 2017
Accounting Policies [Abstract]
Available-for-sale debt securities, accumulated gross unrealized loss before tax	$ (35,000)
Available-for-sale debt securities, accumulated gross unrealized loss, tax	7,000
Accumulated other comprehensive income (loss)	$ (28,000)	$ 1,438,000	$ 1,400,000
Available-for-sale securities, accumulated gross unrealized loss, tax		(493,000)	(835,000)
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax		$ 1,900,000	$ 2,200,000

No definition available.

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- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580

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-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580

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- Definition

Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

+ Details

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- Definition

Amount, before tax, of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

No definition available.

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses on available-for-sale securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of deferred tax liability attributable to taxable temporary differences from unrealized gains on trading securities.

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