Note B - Adoption of New Accounting Pronouncements - Impact of New Standard on Condensed Consolidated Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 24, 2018	Jun. 25, 2017		Mar. 25, 2018
Deferred income taxes	$ 450			$ 0
Total assets	79,420			80,091
Accrued expenses and other current liabilities	6,786			11,248
Deferred franchise fees	568			193
Total current liabilities	13,420			18,006
Other liabilities (Note I)	1,352			1,355
Deferred income taxes				302
Deferred franchise fees	2,634			238
Total liabilities	162,337			164,659
(Accumulated deficit)	(66,437)			(68,181)
Stockholders’ deficit before treasury stock	(5,614)			(7,265)
Total stockholders’ (deficit)	(82,917)			(84,568)
Total liabilities and stockholders’ (deficit)	79,420			$ 80,091
Revenues	30,168	$ 30,803	[1]
General and administrative expenses	3,885	3,671
Advertising fund expense (Note B)	495	0
Total costs and expenses	21,081	22,353
Income from operations	9,087	8,450
Income before provision for income taxes	6,519	4,843
Provision for income taxes	1,724	1,921
Net income	4,795	2,922
Accounts payable, accrued expenses and other current liabilities	(4,874)	5,280
Deferred franchise fees	36	121
Other liabilities	(3)	(89)
Net cash (used in) operating activities	(2,812)	4,388
Net cash (used in) investing activities	(138)	(204)
Net cash (used in) financing activities	(1,371)	(282)
Net (decrease) in cash	(4,321)	3,902
Franchise Fees and Royalties [Member]
Revenues	1,104	1,172	[1]
Advertising Fund Revenue [Member]
Revenues	495		[1]
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Franchise Fees Adjustments [Member]
Deferred income taxes	(731)
Total assets	(731)
Accrued expenses and other current liabilities	6
Deferred franchise fees	(360)
Total current liabilities	(354)
Other liabilities (Note I)	(96)
Deferred income taxes
Deferred franchise fees	(2,303)
Total liabilities	(2,753)
(Accumulated deficit)	2,022
Stockholders’ deficit before treasury stock	2,022
Total stockholders’ (deficit)	2,022
Total liabilities and stockholders’ (deficit)	(731)
Revenues	(72)
General and administrative expenses	(96)
Advertising fund expense (Note B)
Total costs and expenses	(96)
Income from operations	24
Income before provision for income taxes	24
Provision for income taxes	6
Net income	18
Accounts payable, accrued expenses and other current liabilities	6
Deferred franchise fees	72
Other liabilities	(96)
Net cash (used in) operating activities
Net cash (used in) investing activities
Net cash (used in) financing activities
Net (decrease) in cash
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Franchise Fees Adjustments [Member] | Franchise Fees and Royalties [Member]
Revenues	(72)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Franchise Fees Adjustments [Member] | Advertising Fund Revenue [Member]
Revenues
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Balance Sheet Reclassification Adjustments [Member]
Deferred income taxes	281
Total assets	281
Accrued expenses and other current liabilities
Deferred franchise fees
Total current liabilities
Other liabilities (Note I)
Deferred income taxes	281
Deferred franchise fees
Total liabilities	281
(Accumulated deficit)
Stockholders’ deficit before treasury stock
Total stockholders’ (deficit)
Total liabilities and stockholders’ (deficit)	281
Revenues	(495)
General and administrative expenses
Advertising fund expense (Note B)	(495)
Total costs and expenses	(495)
Income from operations
Income before provision for income taxes
Provision for income taxes
Net income
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Balance Sheet Reclassification Adjustments [Member] | Franchise Fees and Royalties [Member]
Revenues
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Balance Sheet Reclassification Adjustments [Member] | Advertising Fund Revenue [Member]
Revenues	(495)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Advertising Fund Adjustments [Member]
Net income
Accounts payable, accrued expenses and other current liabilities
Deferred franchise fees
Other liabilities
Net cash (used in) operating activities
Net cash (used in) investing activities
Net cash (used in) financing activities
Net (decrease) in cash
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Deferred income taxes
Total assets	78,970
Accrued expenses and other current liabilities	6,792
Deferred franchise fees	208
Total current liabilities	13,066
Other liabilities (Note I)	1,256
Deferred income taxes	281
Deferred franchise fees	331
Total liabilities	159,865
(Accumulated deficit)	(64,415)
Stockholders’ deficit before treasury stock	(3,592)
Total stockholders’ (deficit)	(80,895)
Total liabilities and stockholders’ (deficit)	78,970
Revenues	29,601
General and administrative expenses	3,789
Advertising fund expense (Note B)
Total costs and expenses	20,490
Income from operations	9,111
Income before provision for income taxes	6,543
Provision for income taxes	1,730
Net income	4,813
Accounts payable, accrued expenses and other current liabilities	(4,868)
Deferred franchise fees	108
Other liabilities	(99)
Net cash (used in) operating activities	(2,812)
Net cash (used in) investing activities	(138)
Net cash (used in) financing activities	(1,371)
Net (decrease) in cash	(4,321)
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Franchise Fees and Royalties [Member]
Revenues	1,032
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Advertising Fund Revenue [Member]
Revenues

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