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Cash Flow Information - Change in Operating Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 27, 2019 | Apr. 28, 2018 | Apr. 29, 2017
(Increase) decrease: |  |  |
Account receivable | $ 10,856 | $ 2,266 | $ (2,718)
Long-term receivables | 329 | 1,548 | 2,213
Inventories | (4,076) | (8,517) | 3,581
Contract assets | 3,040 | (5,911) | 6,203
Prepaid expenses and other current assets | 472 | (1,252) | (980)
Income taxes receivables | 4,250 | (4,747) | 4,201
Investment in affiliates and other assets | (48) | (413) | 611
Increase (decrease): |  |  |
Accounts payable | (2,747) | (2,573) | 5,544
Contract liabilities | 10,774 | 3,480 | 278
Accrued expenses | 4,631 | 3,472 | 3,208
Warranty obligations | (4,393) | 346 | (2,986)
Long-term warranty obligations | (1,079) | 1,729 | 389
Income taxes payable | (3,023) | (592) | 1,331
Long-term marketing obligations and other payables | (1,116) | 379 | (43)
Change in operating assets and liabilities | $ 11,886 | $ 1,863 | $ 7,204

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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=109223946&loc=d3e3602-108585 + Details
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