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Cash Flow Information - Change in Operating Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
May 02, 2020 | Apr. 27, 2019 | Apr. 28, 2018
(Increase) decrease: |  |  |
Account receivable | $ (7,461) | $ 10,856 | $ 2,266
Long-term receivables | (1,173) | 329 | 1,548
Inventories | (8,347) | (4,076) | (8,517)
Contract assets | 1,931 | 3,040 | (5,911)
Prepaid expenses and other current assets | (1,403) | 472 | (1,252)
Income taxes receivables | 533 | 4,250 | (4,747)
Investment in affiliates and other assets | 3,137 | (48) | (413)
Increase (decrease): |  |  |
Accounts payable | 2,377 | (2,747) | (2,573)
Contract liabilities | 4,548 | 10,774 | 3,480
Accrued expenses | 6,745 | 4,631 | 3,472
Warranty obligations | 273 | (4,393) | 346
Long-term warranty obligations | 883 | (1,079) | 1,729
Income taxes payable | 390 | (3,023) | (592)
Long-term marketing obligations and other payables | (387) | (1,116) | 379
Change in operating assets and liabilities | $ (8,090) | $ 11,886 | $ 1,863

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- Definition The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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