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Unaudited Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 02, 2017
Nov. 26, 2016
Dec. 02, 2017
Nov. 26, 2016
Operating activities:        
Net income (loss) $ 1,668 $ (2,522) $ 1,556 $ (5,372)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities:        
Depreciation and amortization 735 602 1,467 1,317
Inventory provisions 125 66 287 109
Loss (gain) on sale of investments 1 8 (24) 6
Gain on disposal of assets (191)
Share-based compensation expense 208 176 309 279
Deferred income taxes 66 (151) 62 (309)
Change in assets and liabilities:        
Accounts receivable (1,735) 379 312 3,934
Income tax receivable 8 (5)
Inventories (2,021) 1,115 (4,634) 1,483
Prepaid expenses and other assets (357) (1,082) (615) (1,041)
Accounts payable 1,757 (883) (998) (3,221)
Accrued liabilities (517) 2,006 209 862
Other 264 13 (3) 18
NNet cash provided by (used in) operating activities 194 (265) (2,263) (1,940)
Investing activities:        
Capital expenditures (1,720) (1,235) (2,735) (3,299)
Proceeds from sales of assets 276
Proceeds from maturity of investments 4,177 2,117 8,177 3,582
Purchases of investments (3,943) (2,136) (3,943) (2,136)
Proceeds from sales of available-for-sale securities 114 59 265 147
Purchases of available-for-sale securities (114) (59) (265) (147)
Other (2) (3) (5) (6)
Net cash (used in) provided by investing activities (1,488) (1,257) 1,770 (1,859)
Financing activities:        
Cash dividends paid (763) (757) (1,521) (1,515)
Net cash used in financing activities (763) (757) (1,521) (1,515)
Effect of exchange rate changes on cash and cash equivalents 81 (1,098) 1,140 (1,029)
Decrease in cash and cash equivalents (1,976) (3,377) (874) (6,343)
Cash and cash equivalents at beginning of period 56,429 57,488 55,327 60,454
Cash and cash equivalents at end of period $ 54,453 $ 54,111 $ 54,453 $ 54,111