Receivables - (Details) - USD ($) $ in Thousands	12 Months Ended
May 02, 2020	Apr. 27, 2019
Receivables
Allowance for doubtful accounts	$ 2,828	$ 2,208
Retainage on construction-type contracts, expected to be collected in one year	687	440
Financing Receivable
Receivables
Long-term contracts, present value	4,633	3,514
Long-term contracts, face amount	$ 5,166	$ 3,271
Financing Receivable \| Minimum
Receivables
Contract receivables annual interest rates	5.00%
Financing Receivable \| Maximum
Receivables
Contract receivables annual interest rates	9.00%

Contract and Leases Receivable, Interest Rate

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
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-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446

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- Definition

Amount billed to customers under long-term contracts or programs that have been withheld because of retainage provisions in a contract to be collected 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Amount, before allowance for credit loss, of financing receivable.

+ References

+ Details

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- Definition

Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
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-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447

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-Publisher FASB
-Name Accounting Standards Codification
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