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Nature of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Apr. 30, 2022
Accounting Policies [Abstract] |
Equity Method Investments | Summarized financial information for equity method investments consist of the following:
| Year Ended
| April 30, 2022 |  | May 1, 2021 |  | May 2, 2020
Balance sheet data: |  |  |  |  |
Current assets | $ | 6,672 |  |  | $ | 7,534 |  |  | $ | 10,593 |
Non-current assets | 4,491 |  |  | 4,637 |  |  | 4,266 |
Current liabilities | 13,938 |  |  | 2,807 |  |  | 2,755 |
Non-current liabilities | 1,738 |  |  | 1,793 |  |  | 4,086 |
Income statement data: |  |  |  |  |
Net loss | $ | (11,928) |  |  | $ | (13,436) |  |  | $ | (1,383) |
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 statements of cash flows. Restricted cash consists of cash and cash equivalents held in bank deposit accounts to secure issuances of foreign bank guarantees.
| April 30, 2022 |  | May 1, 2021 |  | May 2, 2020
Cash and cash equivalents | $ | 17,143 |  |  | $ | 77,590 |  |  | $ | 40,398 |
Restricted cash | 865 |  |  | 2,812 |  |  | 14 |
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows | $ | 18,008 |  |  | $ | 80,402 |  |  | $ | 40,412 |
Property, Plant and Equipment, Estimated Useful Life | 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
Schedule of Earnings Per Share, Basic and Diluted | The following is a reconciliation of the net income and common share amounts used in the calculation of basic and diluted EPS for the fiscal years ended April 30, 2022, May 1, 2021 and May 2, 2020:
| Net income |  | Shares |  | Per share income
For the year ended April 30, 2022: |  |  |  |  |
Basic earnings per share | $ | 592 |  |  | 45,188 |  |  | $ | 0.01 |
Dilution associated with stock compensation plans | — |  |  | 138 |  |  | — |
Diluted earnings per share | $ | 592 |  |  | 45,326 |  |  | $ | 0.01 |
For the year ended May 1, 2021: |  |  |  |  |
Basic earnings per share | $ | 10,926 |  |  | 44,989 |  |  | $ | 0.24 |
Dilution associated with stock compensation plans | — |  |  | 213 |  |  | — |
Diluted earnings per share | $ | 10,926 |  |  | 45,202 |  |  | $ | 0.24 |
For the year ended May 2, 2020: |  |  |  |  |
Basic earnings per share | $ | 491 |  |  | 45,031 |  |  | $ | 0.01 |
Dilution associated with stock compensation plans | — |  |  | 285 |  |  | — |
Diluted earnings per share | $ | 491 |  |  | 45,316 |  |  | $ | 0.01 |
Accounts Receivable, Allowance for Credit Loss | A reconciliation of the beginning and ending allowance for doubtful accounts is as follows:
| Year Ended
| April 30, 2022 |  | May 1, 2021
Balance as of Balance at beginning of year | $ | 3,942 |  |  | $ | 2,828 |
Charged to costs and expenses | 2,083 |  |  | 3,318 |
Deductions (1) | (3,271) |  |  | (2,204) |
Balance as of Balance at end of year | $ | 2,754 |  |  | $ | 3,942 |
(1) Includes account collections and write offs |  |  |

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