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Nature of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Apr. 27, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Property and Equipment | Property and equipment is stated at cost and depreciated principally on the straight-line method over the following estimated useful lives:
| Years
Buildings | 7 - 40
Machinery and equipment | 5 - 7
Office furniture and equipment | 3 - 5
Computer software and hardware | 3 - 5
Equipment held for rental | 2 - 7
Demonstration equipment | 3 - 5
Transportation equipment | 5 - 7
Property and equipment consisted of the following:
| April 27, 2013 |  | April 28, 2012
Land | $ | 1,497 |  |  | $ | 1,497 |
Buildings | 57,012 |  |  | 56,431 |
Machinery and equipment | 65,600 |  |  | 61,654 |
Office furniture and equipment | 16,118 |  |  | 15,648 |
Computer software and hardware | 41,745 |  |  | 42,172 |
Equipment held for rental | 868 |  |  | 1,003 |
Demonstration equipment | 8,400 |  |  | 9,806 |
Transportation equipment | 4,026 |  |  | 4,116 |
| 195,266 |  |  | 192,327 |
Less accumulated depreciation | 133,641 |  |  | 123,931 |
| $ | 61,625 |  |  | $ | 68,396 |
Schedule of Earnings Per Share Reconciliation | The following is a reconciliation of the income and common stock share amounts used in the calculation of basic and diluted EPS for the fiscal years ended April 27, 2013, April 28, 2012 and April 30, 2011:
| Net income |  | Shares |  | Per share income (loss)
For the year ended April 27, 2013: |  |  |  |  |
Basic earnings per share | $ | 22,779 |  |  | 42,280 |  |  | $ | 0.54 |
Dilution associated with stock compensation plans | — |  |  | 341 |  |  | (0.01 | )
Diluted earnings per share | $ | 22,779 |  |  | 42,621 |  |  | $ | 0.53 |
For the year ended April 28, 2012: |  |  |  |  |  |  |
Basic earnings per share | $ | 8,489 |  |  | 41,869 |  |  | $ | 0.20 |
Dilution associated with stock compensation plans | — |  |  | 435 |  |  | — |
Diluted earnings per share | $ | 8,489 |  |  | 42,304 |  |  | $ | 0.20 |
For the year ended April 30, 2011: |  |  |  |  |  |  |
Basic earnings per share | $ | 14,244 |  |  | 41,422 |  |  | $ | 0.34 |
Dilution associated with stock compensation plans | — |  |  | 855 |  |  | — |
Diluted earnings per share | $ | 14,244 |  |  | 42,277 |  |  | $ | 0.34 |

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- Definition Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph b -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -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 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of the reconciliation of basic net earnings per share (or unit) to diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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