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Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands | Dec. 28, 2018 | Apr. 28, 2018 | Jan. 31, 2018
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money Market Funds (included in Cash and Cash Equivalents) |  | $ 4 | $ 1,798
State and Municipal Obligations (included in Securities Available for Sale) |  |  | 1,511
Swap Contracts (included in Other Assets) |  | 176 | 101
Total assets |  | 180 | 3,410
Swap Contracts (included in Other Liabilities) | $ 1,513 | 1,166 |
Earnout liability (included in Other Liabilities) | 15 | 15 |
Total liabilities | 1,528 | 1,181 |
Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money Market Funds (included in Cash and Cash Equivalents) |  | 4 | 1,798
Total assets |  | 4 | 1,798
Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
State and Municipal Obligations (included in Securities Available for Sale) |  |  | 1,511
Swap Contracts (included in Other Assets) |  | 176 | 101
Total assets |  | 176 | $ 1,612
Swap Contracts (included in Other Liabilities) | 1,513 | 1,166 |
Total liabilities | 1,513 | 1,166 |
Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Earnout liability (included in Other Liabilities) | 15 | 15 |
Total liabilities | $ 15 | $ 15 |

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- Definition Amount of investments in debt securities classified as available-for-sale, expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26626-111562 + Details
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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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