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Cash Flow Information (Tables) | 12 Months Ended
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May. 02, 2015
Supplemental Cash Flow Information [Abstract] |
Summary of Changes in Operating Assets and Liabilities | The changes in operating assets and liabilities consisted of the following:
| Year Ended
| May 2, 2015 |  | April 26, 2014 |  | April 27, 2013
(Increase) decrease: |  |  |  |  |
Restricted cash | $ | 18 |  |  | $ | (466 | ) |  | $ | 1,120 |
Account receivable | 6,412 |  |  | (18,293 | ) |  | 3,364 |
Long-term receivables | 3,234 |  |  | 3,027 |  |  | 2,348 |
Inventories | (1,907 | ) |  | (12,771 | ) |  | 6,656 |
Costs and estimated earnings in excess of billings | (1,667 | ) |  | 5,955 |  |  | (16,335 | )
Prepaid expenses and other current assets | (575 | ) |  | (536 | ) |  | (658 | )
Income taxes receivable | (3,084 | ) |  | (2,414 | ) |  | 5,944 |
Advertising rights and other assets | 912 |  |  | 64 |  |  | 386 |
Increase (decrease): |  |  |  |  |  |  |  |
Current marketing obligations and other payables | (146 | ) |  | 372 |  |  | 3 |
Accounts payable | 5,594 |  |  | 6,701 |  |  | 4,749 |
Customer deposits | (1,315 | ) |  | 4,931 |  |  | (450 | )
Accrued liabilities | 2,860 |  |  | 165 |  |  | 2,909 |
Warranty obligations | (2,638 | ) |  | 543 |  |  | 884 |
Billings in excess of costs and estimated earnings | 1,314 |  |  | 8,238 |  |  | (140 | )
Long-term warranty obligations | 1,869 |  |  | 1,560 |  |  | 2,048 |
Income taxes payable | (666 | ) |  | (527 | ) |  | 1,023 |
Deferred revenue | (250 | ) |  | (836 | ) |  | (577 | )
Long-term marketing obligations and other payables | 3,468 |  |  | (501 | ) |  | (171 | )
| $ | 13,433 |  |  | $ | (4,788 | ) |  | $ | 13,103 |
Schedule of Supplemental Cash Flow Information | Supplemental disclosures of cash flow information consisted of the following:
| Year Ended
| May 2, 2015 |  | April 26, 2014 |  | April 27, 2013
Cash payments for: |  |  |  |  |
Interest | $ | 289 |  |  | $ | 198 |  |  | $ | 420 |
Income taxes, net of refunds | 8,690 |  |  | 16,521 |  |  | 5,422 |
Schedule of Non-Cash Investing and Financing Activities | Supplemental schedule of non-cash investing and financing activities consisted of the following:
|  | Year Ended
|  | May 2, 2015 |  | April 26, 2014 |  | April 27, 2013
Demonstration equipment transferred to inventory |  | $ | 34 |  |  | $ | 255 |  |  | $ | 612 |
Purchases of property and equipment included in accounts payable |  | 1,510 |  |  | 2,099 |  |  | 1,207 |
Contributions of common stock under the employee stock purchase plan |  | 2,512 |  |  | 1,552 |  |  | 1,482 |

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- Definition Tabular disclosure of the net increase (decrease) in operating capital in the operating section of the statement of cash flows, represents the entire footnote disclosure that provides details regarding the net change during the reporting period of all assets and liabilities used in operating activities. + References No definition available. + Details
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- Definition Tabular disclosure of all or some of the information related to other significant noncash investing and financing activities that occurred during the accounting period and are not otherwise listed in the existing taxonomy. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of a transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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