Receivables	12 Months Ended
Apr. 27, 2019
Receivables [Abstract]
Receivables	Note 9. Receivables We invoice customers based on a billing schedule as established in our contracts. We sometimes have the ability to file a contractor’s lien against the product installed as collateral and to file claims against surety bonds to protect our interest in receivables. Foreign sales are at times secured by irrevocable letters of credit or bank guarantees. Accounts receivable are reported net of an allowance for doubtful accounts of $2,208 and $2,151 at April 27, 2019 and April 28, 2018, respectively. Included in accounts receivable as of April 27, 2019 and April 28, 2018 was $440 and $964, respectively, of retainage on construction-type contracts, all of which is expected to be collected within one year. In some contracts with customers, we agreed to installment payments exceeding 12 months. The present value of these contracts and leases are recorded as a receivable as the revenue is recognized in accordance with GAAP, and profit is recognized to the extent the present value is in excess of cost. We generally retain a security interest in the equipment or in the cash flow generated by the equipment until the contract is paid. The present value of long-term contracts and lease receivables, including accrued interest and current maturities, was $3,514 and $3,393 as of April 27, 2019 and April 28, 2018, respectively. Contract and lease receivables bearing annual interest rates of 4.8 to 9.0 percent are due in varying annual installments through August 2024. The face amount of long-term receivables was $3,271 as of April 27, 2019 and $3,733 as of April 28, 2018.

Note 9. Receivables

We invoice customers based on a billing schedule as established in our contracts. We sometimes have the ability to file a contractor’s lien against the product installed as collateral and to file claims against surety bonds to protect our interest in receivables. Foreign sales are at times secured by irrevocable letters of credit or bank guarantees. Accounts receivable are reported net of an allowance for doubtful accounts of $2,208 and $2,151 at April 27, 2019 and April 28, 2018, respectively. Included in accounts receivable as of April 27, 2019 and April 28, 2018 was $440 and $964, respectively, of retainage on construction-type contracts, all of which is expected to be collected within one year.

In some contracts with customers, we agreed to installment payments exceeding 12 months. The present value of these contracts and leases are recorded as a receivable as the revenue is recognized in accordance with GAAP, and profit is recognized to the extent the present value is in excess of cost. We generally retain a security interest in the equipment or in the cash flow generated by the equipment until the contract is paid. The present value of long-term contracts and lease receivables, including accrued interest and current maturities, was $3,514 and $3,393 as of April 27, 2019 and April 28, 2018, respectively. Contract and lease receivables bearing annual interest rates of 4.8 to 9.0 percent are due in varying annual installments through August 2024. The face amount of long-term receivables was $3,271 as of April 27, 2019 and $3,733 as of April 28, 2018.