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Cashflow Information | 12 Months Ended
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Apr. 28, 2012
Cash Flow Information [Abstract] |
Cash Flow Information | Cash Flow Information The changes in operating assets and liabilities consisted of the following:
| Year Ended
| April 28, 2012 |  | April 30, 2011 |  | May 1, 2010
(Increase) decrease: |  |  |  |  |
Restricted cash | $ | 377 |  |  | $ | (282 | ) |  | $ | (181 | )
Account receivable | (4,995 | ) |  | (16,837 | ) |  | 14,073 |
Long-term receivables | 462 |  |  | (756 | ) |  | 4,165 |
Inventories | (7,539 | ) |  | (10,341 | ) |  | 17,711 |
Costs and estimated earnings in excess of billings | 1,173 |  |  | 1,040 |  |  | 2,308 |
Prepaid expenses and other current assets | 784 |  |  | 82 |  |  | (812 | )
Income taxes receivable | (1,120 | ) |  | 2,574 |  |  | (7,444 | )
Advertising rights and other assets | 226 |  |  | 823 |  |  | 1,043 |
Increase (decrease): |  |  |  |  |  |  |  |
Accounts payable and accrued expenses | 6,975 |  |  | 11,242 |  |  | (6,399 | )
Customer deposits | 1,538 |  |  | 1,940 |  |  | (659 | )
Billings in excess of costs and estimated earnings | (5,899 | ) |  | 7,179 |  |  | (664 | )
Long-term warranty obligations | (767 | ) |  | 4,561 |  |  | (576 | )
Income taxes payable | (215 | ) |  | 853 |  |  | (2,715 | )
Long-term deferred revenue | 783 |  |  | 1,256 |  |  | 1,446 |
Other long-term obligations | (915 | ) |  | 41 |  |  | (208 | )
| $ | (9,132 | ) |  | $ | 3,375 |  |  | $ | 21,088 |
Supplemental disclosures of cash flow information consisted of the following:
| Year Ended
| April 28, 2012 |  | April 30, 2011 |  | May 1, 2010
Cash payments for: |  |  |  |  |
Interest | $ | 306 |  |  | $ | 113 |  |  | $ | 262 |
Income taxes, net of refunds | 4,292 |  |  | (3,683 | ) |  | 7,745 |
Supplemental schedule of non-cash investing and financing activities consisted of the following:
| Year Ended
| April 28, 2012 |  | April 30, 2011 |  | May 1, 2010
Demonstration equipment transferred to inventories | $ | 409 |  |  | $ | 896 |  |  | $ | 1,955 |
Contributions of common stock under the employee stock purchase plan | 1,413 |  |  | 1,382 |  |  | 1,699 |
Purchase of plant and equipment included in accounts payable and notes payable | 1,475 |  |  | 673 |  |  | 289 |
Transfer of equipment or conversion of accounts receivable from affiliates | — |  |  | — |  |  | 53 |

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- Definition The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the 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 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: 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 4: 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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