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Note 6 - Receivables (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
May 01, 2021 | May 02, 2020
Accounts Receivable, Allowance for Credit Loss, Current | $ 3,942 | $ 2,828
Accounts Receivable, after Allowance for Credit Loss, Current, Total | 67,808 | 72,577
Retainage on Construction-type Contracts [Member] |  |
Accounts Receivable, after Allowance for Credit Loss, Current, Total | 660 | 687
Financing Receivable [Member] |  |
Financing Receivable, after Allowance for Credit Loss, Total | 3,097 | 4,633
Financing Receivable, before Allowance for Credit Loss, Total | $ 3,438 | $ 5,166
Financing Receivable [Member] | Minimum [Member] |  |
Contract and Leases Receivable, Interest Rate | 5.00% |
Financing Receivable [Member] | Maximum [Member] |  |
Contract and Leases Receivable, Interest Rate | 9.00% |

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