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Long-Term Debt (Narrative) (Detail) - USD ($) | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 | Jul. 01, 2017 | Dec. 28, 2016 | Aug. 06, 2015 | Sep. 03, 2014
Debt Disclosure [Line Items] |  |  |  |  |  |
Long-term Debt | $ 34,995,000 | $ 34,995,000 |  |  |  | $ 35,000,000
Debt Instrument, Periodic Payment, Principal |  | 1,250,000 |  |  |  |
Revolving loan | 16,222,000 | 16,222,000 | $ 18,335,000 |  |  |
Letters of Credit Outstanding, Amount | 400,000 | 400,000 | 400,000 |  |  |
Additional availability of line of credit | 28,400,000 | 28,400,000 | 26,300,000 |  |  |
Debt Instrument, Unused Borrowing Capacity, Amount | 2,100,000 | 2,100,000 |  |  |  |
2019 | 5,871,000 | 5,871,000 |  |  |  |
2020 | 28,342,000 | 28,342,000 |  |  |  |
2021 | 871,000 | 871,000 |  |  |  |
Total debt | 35,084,000 | 35,084,000 |  |  |  |
Unamortized Debt Issuance Expense | (89,000) | (89,000) |  |  |  |
Long-term Debt |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Long-term Debt | 16,300,000 | 16,300,000 | 21,300,000 |  |  |
Equipment Term Loan |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Long-term Debt | $ 2,600,000 | 2,600,000 | $ 3,500,000 | $ 3,900,000 |  |
Debt Instrument, Periodic Payment, Principal |  | $ 200,000 |  |  |  |
Wells Fargo Bank |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Increase in revolving line of credit |  |  |  |  | $ 45,000,000.0 |
Maximum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 5.00% | 5.00% | 4.25% |  |  |
Minimum |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 4.0935% | 4.0935% | 3.22% |  |  |
One-Month London Interbank Offered Rate [Member] | Line of Credit |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Variable rate on line of credit facility (percent) | 1.50% |  |  |  |  |
Federal Funds Rate [Member] | Line of Credit |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Variable rate on line of credit facility (percent) | 1.50% |  |  |  |  |
Fixed Rate [Member] | Debt Instrument, Basis Spread on Variable Rate, Scenario One [Member] | Line of Credit |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Variable rate on line of credit facility (percent) | 1.75% |  |  |  |  |
Fixed Rate [Member] | Debt Instrument, Basis Spread on Variable Rate, Scenario Two [Member] | Line of Credit | Line of Credit |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Variable rate on line of credit facility (percent) |  |  | 2.00% |  |  |
Fixed Rate [Member] | Debt Instrument, Basis Spread on Variable Rate, Scenario Three [Member] | Line of Credit | Line of Credit |  |  |  |  |  |
Debt Disclosure [Line Items] |  |  |  |  |  |
Variable rate on line of credit facility (percent) | 2.25% |  |  |  |  |

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Amount of the required periodic payments applied to principal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Represents the aggregate of total long-term debt, including current maturities and short-term debt. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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