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Nature of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Apr. 27, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Cash and Cash Equivalents | The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the totals of the same amounts shown in the consolidated statement of cash flows:
| April 27, 2019 |  | April 28, 2018 |  | April 29, 2017
Cash and cash equivalents | $ | 35,383 |  |  | $ | 29,727 |  |  | $ | 32,623 |
Restricted cash | 359 |  |  | 28 |  |  | 216 |
Total cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows | $ | 35,742 |  |  | $ | 29,755 |  |  | $ | 32,839 |
Restrictions on Cash and Cash Equivalents | The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the consolidated balance sheets that sum to the totals of the same amounts shown in the consolidated statement of cash flows:
| April 27, 2019 |  | April 28, 2018 |  | April 29, 2017
Cash and cash equivalents | $ | 35,383 |  |  | $ | 29,727 |  |  | $ | 32,623 |
Restricted cash | 359 |  |  | 28 |  |  | 216 |
Total cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows | $ | 35,742 |  |  | $ | 29,755 |  |  | $ | 32,839 |
Schedule of Property and Equipment | In accordance with ASC 360, Property, Plant, and Equipment, property and equipment are stated at cost and depreciated principally on the straight-line method over the following estimated useful lives:
| Years
Buildings and improvements | 5 - 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, net consisted of the following:
| April 27, 2019 |  | April 28, 2018
Land | $ | 1,738 |  |  | $ | 2,161 |
Buildings | 66,403 |  |  | 67,773 |
Machinery and equipment | 96,486 |  |  | 93,439 |
Office furniture and equipment | 6,195 |  |  | 5,878 |
Computer software and hardware | 55,460 |  |  | 53,004 |
Equipment held for rental | 287 |  |  | 287 |
Demonstration equipment | 7,422 |  |  | 7,035 |
Transportation equipment | 7,715 |  |  | 7,632 |
| 241,706 |  |  | 237,209 |
Less accumulated depreciation | 176,392 |  |  | 169,150 |
| $ | 65,314 |  |  | $ | 68,059 |
Schedule of Earnings Per Share Reconciliation | The following is a reconciliation of the net (loss) income and common share amounts used in the calculation of basic and diluted EPS for the fiscal years ended April 27, 2019, April 28, 2018 and April 29, 2017:
| Net (loss) income |  | Shares |  | Per share (loss) income
For the year ended April 27, 2019: |  |  |  |  |
Basic loss per share | $ | (958 | ) |  | 44,926 |  |  | $ | (0.02 | )
Dilution associated with stock compensation plans | — |  |  | — |  |  | — |
Diluted loss per share | $ | (958 | ) |  | 44,926 |  |  | $ | (0.02 | )
For the year ended April 28, 2018: |  |  |  |  |  |  |
Basic earnings per share | $ | 5,562 |  |  | 44,457 |  |  | $ | 0.13 |
Dilution associated with stock compensation plans | — |  |  | 416 |  |  | (0.01 | )
Diluted earnings per share | $ | 5,562 |  |  | 44,873 |  |  | $ | 0.12 |
For the year ended April 29, 2017: |  |  |  |  |  |  |
Basic earnings per share | $ | 10,342 |  |  | 44,114 |  |  | $ | 0.23 |
Dilution associated with stock compensation plans | — |  |  | 189 |  |  | — |
Diluted earnings per share | $ | 10,342 |  |  | 44,303 |  |  | $ | 0.23 |

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