CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Balance at Beginning of Period at Apr. 27, 2019	$ 187,663	$ 57,699	$ 42,561	$ 93,593	$ (1,834)	$ (4,356)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,030			7,030
Cumulative translation adjustments	(526)					(526)
Unrealized gain (loss) on available-for-sale securities, net of tax	41					41
Share-based compensation	643		643
Employee savings plan activity	779	779
Dividends paid	(2,250)			(2,250)
Treasury stock purchase	1,187				1,187
Balance at End of Period at Aug. 03, 2019	192,193	58,478	43,204	98,373	(3,021)	(4,841)
Balance at Beginning of Period at May. 02, 2020	176,980	60,010	44,627	85,090	(7,470)	(5,277)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,467			7,467
Cumulative translation adjustments	1,037					1,037
Unrealized gain (loss) on available-for-sale securities, net of tax	0
Share-based compensation	539		539
Treasury stock reissued	199		26		173
Balance at End of Period at Aug. 01, 2020	$ 186,222	$ 60,010	$ 45,192	$ 92,557	$ (7,297)	$ (4,240)