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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Apr. 30, 2022 | May 01, 2021
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Income Tax Disclosure [Abstract] |  |
Accrued warranty obligations | $ 7,117 | $ 6,293
Vacation accrual | 1,618 | 1,222
Deferred maintenance revenue | 272 | 398
Allowance for excess and obsolete inventory | 2,316 | 1,776
Equity compensation | 276 | 324
Allowance for doubtful accounts | 528 | 829
Inventory capitalization | 1,278 | 583
Accrued compensation and benefits | 1,019 | 1,707
Unrealized loss on foreign currency exchange | 0 | 85
Net operating loss carry forwards | 729 | 856
Research and development tax credit carry forwards | 396 | 516
Lease accounting - lease liability | 1,918 | 1,572
Other | 2,296 | 1,513
Total deferred tax assets | 19,763 | 17,674
Valuation allowance | (2,452) | (1,732)
Net deferred tax assets | 17,311 | 15,942
Property and equipment | (1,693) | (2,373)
Lease accounting - right of use asset | (1,907) | (1,580)
Prepaid expenses | (428) | (337)
Intangible assets | 0 | (69)
Unrealized gain on foreign currency exchange | (180) | 0
Other | (59) | (49)
Total deferred tax liabilities | (4,267) | (4,408)
Net deferred tax asset | 13,044 | 11,534
Non-current assets | 13,331 | 11,944
Non-current liabilities | $ (287) | $ (410)

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