CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at May. 31, 2020		29,224
Beginning balance at May. 31, 2020	$ 231,044	$ 29	$ 162,578	$ 71,245	$ (2,808)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under stock plans, net of shares withheld (in shares)		18
Issuance of stock under stock plans, net of shares withheld	0
Taxes paid by Company for employee stock plans	(82)		(82)
Stock-based compensation	892		892
Net loss	(11,000)			(11,000)
Other comprehensive income, net of tax	304				304
Ending balance (in shares) at Aug. 30, 2020		29,242
Ending balance at Aug. 30, 2020	221,158	$ 29	163,388	60,245	(2,504)
Beginning balance (in shares) at May. 30, 2021		29,333
Beginning balance at May. 30, 2021	202,784	$ 29	165,533	38,580	(1,358)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under stock plans, net of shares withheld (in shares)		129
Issuance of stock under stock plans, net of shares withheld	0
Taxes paid by Company for employee stock plans	(428)		(428)
Stock-based compensation	620		620
Net loss	(9,477)			(9,477)
Other comprehensive income, net of tax	366				366
Ending balance (in shares) at Aug. 29, 2021		29,462
Ending balance at Aug. 29, 2021	$ 193,865	$ 29	$ 165,725	$ 29,103	$ (992)