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Fair Value - Additional Information (Detail) - USD ($) |  | 9 Months Ended |
--- | --- | --- | ---
Feb. 01, 2017 | Oct. 28, 2017 | Feb. 28, 2017
Term Loan [Member] |  |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |  |
Credit facility, maximum borrowing capacity |  | $ 8,648,000 |
Bank of America, N.A. [Member] | Term Loan [Member] |  |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |  |
Credit facility, maximum borrowing capacity |  |  | $ 9,200,000
Contingent Consideration Liability [Member] |  |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |  |
Estimated target period |  | 7 years |
Estimated earnout targets | $ 407,000 | $ 400,000 |
Estimated earnout targets | $ 1,280,000 | $ 1,400,000 |
Contingent Consideration Liability [Member] | Minimum [Member] |  |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |  |
Fair value assumptions, risk-adjusted discount rate | 1.77% | 1.58% |
Probability of success | 1.60% | 0.00% |
Contingent Consideration Liability [Member] | Maximum [Member] |  |  |
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items] |  |  |
Fair value assumptions, risk-adjusted discount rate | 3.35% | 2.76% |
Probability of success | 87.20% | 46.80% |

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- Definition This element represents the amount of any change recognized during the period in the high-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition This element represents the amount of any change recognized during the period in the low-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + 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 Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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