CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock Issued $0.50 Par Value [Member]	Capital In Excess of Par Value [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total
Balance at Mar. 30, 2019	$ 3,605	$ 16,467	$ (611)	$ 40,169	$ 59,630
Balance (in Shares) at Mar. 30, 2019	7,211,000
Issuance of Common Stock	$ 14	355			369
Issuance of Common Stock (in Shares)	28,000
Repurchase of Common Stock	$ (27)	(561)		(758)	(1,346)
Repurchase of Common Stock (in Shares)	(55,000)
Stock-Based Compensation	$ 60	143			203
Stock-Based Compensation (in Shares)	120,000
Other Comprehensive Income (Loss)			129		129
Net Income				1,718	1,718
Balance at Jun. 29, 2019	$ 3,652	16,404	(482)	41,129	60,703
Balance (in Shares) at Jun. 29, 2019	7,304,000
Balance at Mar. 30, 2019	$ 3,605	16,467	(611)	40,169	59,630
Balance (in Shares) at Mar. 30, 2019	7,211,000
Net Income					5,574
Balance at Dec. 28, 2019	$ 3,688	17,556	(444)	43,984	64,784
Balance (in Shares) at Dec. 28, 2019	7,376,000
Balance at Jun. 29, 2019	$ 3,652	16,404	(482)	41,129	60,703
Balance (in Shares) at Jun. 29, 2019	7,304,000
Issuance of Common Stock	$ 59	944			1,003
Issuance of Common Stock (in Shares)	117,000
Repurchase of Common Stock	$ (32)	(443)		(1,001)	(1,476)
Repurchase of Common Stock (in Shares)	(63,000)
Stock-Based Compensation		102			102
Other Comprehensive Income (Loss)			(55)		(55)
Net Income				2,379	2,379
Balance at Sep. 28, 2019	$ 3,679	17,007	(537)	42,507	62,656
Balance (in Shares) at Sep. 28, 2019	7,358,000
Issuance of Common Stock	$ 9	244			253
Issuance of Common Stock (in Shares)	18,000
Stock-Based Compensation		305			305
Other Comprehensive Income (Loss)			93		93
Net Income				1,477	1,477
Balance at Dec. 28, 2019	$ 3,688	17,556	(444)	43,984	64,784
Balance (in Shares) at Dec. 28, 2019	7,376,000
Balance at Mar. 28, 2020	$ 3,691	17,929	(1,010)	46,477	$ 67,087
Balance (in Shares) at Mar. 28, 2020	7,381,000				7,381,180
Issuance of Common Stock	$ 14	369			$ 383
Issuance of Common Stock (in Shares)	28,000
Repurchase of Common Stock	$ (24)	(579)		(684)	(1,287)
Repurchase of Common Stock (in Shares)	(48,000)
Stock-Based Compensation	$ 25	287			312
Stock-Based Compensation (in Shares)	50,000
Other Comprehensive Income (Loss)			163		163
Net Income				798	798
Balance at Jun. 27, 2020	$ 3,706	18,006	(847)	46,591	67,456
Balance (in Shares) at Jun. 27, 2020	7,411,000
Balance at Mar. 28, 2020	$ 3,691	17,929	(1,010)	46,477	$ 67,087
Balance (in Shares) at Mar. 28, 2020	7,381,000				7,381,180
Net Income					$ 4,583
Balance at Dec. 26, 2020	$ 3,721	18,820	(410)	50,376	$ 72,507
Balance (in Shares) at Dec. 26, 2020	7,441,000				7,441,571
Balance at Jun. 27, 2020	$ 3,706	18,006	(847)	46,591	$ 67,456
Balance (in Shares) at Jun. 27, 2020	7,411,000
Issuance of Common Stock	$ 1	90			91
Issuance of Common Stock (in Shares)	3,000
Stock-Based Compensation	$ 9	357			366
Stock-Based Compensation (in Shares)	18,000
Other Comprehensive Income (Loss)			165		165
Net Income				2,024	2,024
Balance at Sep. 26, 2020	$ 3,716	18,453	(682)	48,615	70,102
Balance (in Shares) at Sep. 26, 2020	7,432,000
Issuance of Common Stock	$ 5	170			175
Issuance of Common Stock (in Shares)	9,000
Stock-Based Compensation		197			197
Stock-Based Compensation (in Shares)
Other Comprehensive Income (Loss)			272		272
Net Income				1,761	1,761
Balance at Dec. 26, 2020	$ 3,721	$ 18,820	$ (410)	$ 50,376	$ 72,507
Balance (in Shares) at Dec. 26, 2020	7,441,000				7,441,571