Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Nov. 29, 2014	Nov. 30, 2013	Nov. 29, 2014	Nov. 30, 2013
Operating activities:
Net income (loss)	$ (1,057)us-gaap_NetIncomeLoss	$ 524us-gaap_NetIncomeLoss	$ (1,140)us-gaap_NetIncomeLoss	$ 2,492us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities:
Depreciation and amortization	443	273	809	521
Gain on sale of investments	(6)us-gaap_GainLossOnSaleOfInvestments	(12)us-gaap_GainLossOnSaleOfInvestments	(9)us-gaap_GainLossOnSaleOfInvestments	(19)us-gaap_GainLossOnSaleOfInvestments
(Gain) loss on disposal of assets	(26)	0	(26)	0
Share-based compensation expense	266us-gaap_ShareBasedCompensation	270us-gaap_ShareBasedCompensation	386us-gaap_ShareBasedCompensation	384us-gaap_ShareBasedCompensation
Deferred income taxes	(88)	(108)	(167)	(167)
Change in assets and liabilities, net of effect of acquired businesses:
Accounts receivable	78	(508)	(294)	(1,726)
Income tax receivable	580	357	2,888	3,108
Inventories	(2,151)us-gaap_IncreaseDecreaseInInventories	310us-gaap_IncreaseDecreaseInInventories	(4,261)us-gaap_IncreaseDecreaseInInventories	(140)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other assets	(1,038)	(430)	(903)	(274)
Accounts payable	1,388	317	1,489	(2,230)
Accrued liabilities	(439)	(565)	(1,101)	(2,455)
Long-term income tax liabilities	0us-gaap_IncreaseDecreaseInIncomeTaxes	(235)us-gaap_IncreaseDecreaseInIncomeTaxes	0us-gaap_IncreaseDecreaseInIncomeTaxes	(477)us-gaap_IncreaseDecreaseInIncomeTaxes
Other	42	56	(7)	47
Net cash provided by (used in) operating activities	(2,008)	249	(2,336)	(936)
Investing activities:
Cash consideration paid for acquired businesses	0	0	0	(973)
Capital expenditures	(1,102)	(540)	(1,936)	(981)
Proceeds from maturity of investments	725	14,044	31,207	54,532
Purchases of investments	(981)	(11,458)	(33,343)	(51,552)
Proceeds from sales of available-for-sale securities	37	20	74	76
Purchases of available-for-sale securities	(37)	(20)	(74)	(76)
Other	(2)	22	(30)	91
Net cash provided by (used in) investing activities	(1,360)	2,068	(4,102)	1,117
Financing activities:
Repurchase of common stock	(2,151)	(2,025)	(2,640)	(8,725)
Proceeds from issuance of common stock	130	100	288	171
Cash dividends paid	(817)us-gaap_PaymentsOfDividends	(828)us-gaap_PaymentsOfDividends	(1,645)us-gaap_PaymentsOfDividends	(1,685)us-gaap_PaymentsOfDividends
Other	(4)	0	(2)	1
Net cash used in financing activities	(2,842)	(2,753)	(3,999)	(10,238)
Effect of exchange rate changes on cash and cash equivalents	(1,988)	552	(2,429)	701
Increase/ (decrease) in cash and cash equivalents	(8,198)	116	(12,866)	(9,356)
Cash and cash equivalents at beginning of period	98,084	92,530	102,752	102,002
Cash and cash equivalents at end of period	$ 89,886	$ 92,646	$ 89,886	$ 92,646

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The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

+ Details

Name:	us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from sales of all investments, including securities and other assets, having ready marketability and intended by management to be liquidated, if necessary, beyond the current operating cycle.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromSaleOfLongtermInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration