Note B - Adoption of New Accounting Pronouncements (Details Textual) - USD ($)	3 Months Ended
	Jun. 24, 2018	Jun. 25, 2017	[2]	Mar. 26, 2018	Mar. 25, 2018	[1]
Contract with Customer, Liability, Total	$ 3,202,000				$ 3,139,000
Revenue from Contract with Customer, Excluding Assessed Tax, Total	30,168,000	$ 30,803,000
Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	107,000	$ 60,000
Accounting Standards Update 2014-09 [Member]
Contract with Customer, Liability, Total				$ 2,735,000
Deferred Franchise Fees [Member]
Contract with Customer, Liability, Total	360,000
Other Liabilities [Member]
Contract with Customer, Liability, Total	$ 2,409,000
AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption				$ (2,004,000)

[1] Includes the cumulative effect of adopting ASC-606 of $2,735.

[2] As disclosed in Note B, prior period amounts have not been adjusted under the modified retrospective method of adoption of ASC 606.