XML 97 R80.htm IDEA: XBRL DOCUMENT v3.19.1
Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 8 Months Ended 9 Months Ended 12 Months Ended
Dec. 22, 2017
Jan. 26, 2019
Apr. 27, 2019
Apr. 28, 2018
Apr. 29, 2017
Operating Loss Carryforwards [Line Items]          
Deferred tax assets, gross     $ 15,808 $ 15,532  
Deferred tax asset valuation allowance     893 1,506  
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations   $ 2,775 2,741 139  
Deferred Other Tax Expense (Benefit)   $ 480 471    
Tax Cuts and Jobs Act of 2017, Complete Accounting, Change in Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense       3,534  
Tax Cuts And Jobs Act of 2017, Complete Accounting, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense       $ 285  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00%     30.40% 35.00%
Accrued interest or penalties     26 $ 238  
International          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards     5,722    
Deferred tax assets, gross     1,059    
Ireland and Belgium [Domain]          
Operating Loss Carryforwards [Line Items]          
Deferred tax asset valuation allowance     $ 687