Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2019	Dec. 01, 2018	Nov. 30, 2019	Dec. 01, 2018
Operating activities:
Net (loss) income	$ (622)	$ (304)	$ (465)	$ 127
Adjustments to reconcile net (loss) income to cash provided by (used in) operating activities:
Depreciation and amortization	825	792	1,658	1,556
Inventory provisions	120	150	281	365
Loss on disposal of assets			1
Share-based compensation expense	182	230	370	395
Deferred income taxes	23	97	(25)	155
Change in assets and liabilities:
Accounts receivable	(335)	100	1,826	(98)
Inventories	(2,062)	(1,908)	(3,419)	(1,831)
Prepaid expenses and other assets	(423)	(319)	202	(282)
Accounts payable	2,590	1,538	(1,365)	(3,881)
Accrued liabilities	486	344	(390)	571
Other	(165)	161	(109)	174
Net cash provided by (used in) operating activities	619	881	(1,435)	(2,749)
Investing activities:
Capital expenditures	(475)	(1,120)	(814)	(2,192)
Proceeds from maturity of investments			8,000
Purchases of investments	(13,000)	(3,000)	(13,000)	(5,300)
Net cash used in investing activities	(13,475)	(4,120)	(5,814)	(7,492)
Financing activities:
Proceeds from issuance of common stock	59	11	59	203
Cash dividends paid	(775)	(770)	(1,550)	(1,534)
Payment of financing lease principal	(45)		(75)
Other	(4)
Net cash used in financing activities	(765)	(759)	(1,566)	(1,331)
Effect of exchange rate changes on cash and cash equivalents	218	(621)	(150)	(1,034)
Decrease in cash and cash equivalents	(13,403)	(4,619)	(8,965)	(12,606)
Cash and cash equivalents at beginning of period	46,457	52,478	42,019	60,465
Cash and cash equivalents at end of period	$ 33,054	$ 47,859	$ 33,054	$ 47,859