Note B - Adoption of New Accounting Pronouncements (Details Textual) - USD ($)		3 Months Ended			9 Months Ended
		Dec. 23, 2018	Dec. 24, 2017	[4]	Dec. 23, 2018		Dec. 24, 2017	[4]	Mar. 26, 2018	Mar. 25, 2018
Cumulative Effect of New Accounting Principle in Period of Adoption										$ (2,004,000)
Contract with Customer, Asset, Net, Total	[1]	$ 480,000			$ 480,000
Contract with Customer, Liability, Excluding Cash Received	[2]	3,076,000			3,076,000
Contract with Customer, Liability, Total		3,619,000			3,619,000					$ 3,139,000	[3]
Revenue from Contract with Customer, Excluding Assessed Tax, Total		20,222,000	$ 22,021,000		79,720,000	[4]	$ 84,295,000
Franchise [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total		106,000	$ 125,000		348,000		$ 282,000
Accounting Standards Update 2014-09 [Member]
Contract with Customer, Liability, Total		2,735,000			2,735,000
Accounts and Other Receivables, Net [Member]
Contract with Customer, Asset, Net, Total		80,000			80,000
Long-term Contractual Accounts Receivable [Member]
Contract with Customer, Asset, Net, Total		400,000			400,000
Deferred Franchise Fees [Member]
Contract with Customer, Liability, Excluding Cash Received		319,000			319,000
Other Liabilities [Member]
Contract with Customer, Liability, Excluding Cash Received		$ 2,757,000			$ 2,757,000
AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption									$ (2,004,000)

[1] Receivables of $80 and $400 are included in Accounts and other receivables, net and Long term contractual accounts receivable, respectively.

[2] Deferred franchise fees of $319 and $2,757 are included in Deferred franchise fees - current and long term, respectively.

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

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