Condensed Consolidated Statement of Shareholder's Equity Statement - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]
Shares outstanding, beginning balance at Mar. 31, 2019		10,592,450
Stockholders' equity, beginning balance at Mar. 31, 2019	$ 217,861	$ 530	$ 52,609	$ 164,405	$ 317
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared and paid	(2,460)			(2,460)
Share-based compensation expense	509		509
Vesting of restricted stock (shares)		27,620
Vesting of restricted stock	0	$ 1	(1)
Shares surrendered for payroll taxes (shares)		9,160
Shares surrendered for payroll taxes	$ (343)	$ 1	(342)
Shares repurchased (shares)	(47,136)	(47,136)
Shares repurchased	$ (1,803)	$ (2)	(1,801)
Unrealized loss on interest rate swap	(179)				(179)
Net income	9,807			9,807
Shares outstanding, ending balance at Jun. 30, 2019		10,563,774
Stockholders' equity, ending balance at Jun. 30, 2019	223,392	$ 528	50,974	171,752	138
Shares outstanding, beginning balance at Mar. 29, 2020		10,512,229
Stockholders' equity, beginning balance at Mar. 29, 2020	233,484	$ 526	50,090	182,947	(79)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared and paid	(2,479)			(2,479)
Share-based compensation expense	700		700
Vesting of restricted stock (shares)		5,263
Vesting of restricted stock	0	$ 0	0
Shares surrendered for payroll taxes (shares)		(1,657)
Shares surrendered for payroll taxes	$ (54)	$ 0	(54)
Shares repurchased (shares)	0
Shares repurchased	$ 0
Unrealized loss on interest rate swap	(10)				(10)
Net income	11,788			11,788
Shares outstanding, ending balance at Jun. 28, 2020		10,515,835
Stockholders' equity, ending balance at Jun. 28, 2020	$ 243,429	$ 526	$ 50,736	$ 192,256	$ (89)