XML 63 R51.htm IDEA: XBRL DOCUMENT v3.10.0.1
Receivables (Details) - USD ($)
$ in Thousands
9 Months Ended
Jan. 26, 2019
Apr. 28, 2018
Receivables    
Allowance for doubtful accounts $ 2,387 $ 2,151
Retainage on construction-type contracts, expected to be collected in one year 928 964
Financing Receivable    
Receivables    
Long-term contracts and lease receivables, present value 3,245 3,393
Long-term contracts and lease receivables, face amount $ 3,440 $ 3,733
Financing Receivable | Minimum    
Receivables    
Contract and lease receivables annual interest rates 4.80%  
Financing Receivable | Maximum    
Receivables    
Contract and lease receivables annual interest rates 9.00%