Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) - Foreign Tax Authority - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jan. 31, 2023
Jan. 31, 2022
Jan. 31, 2023
Jan. 31, 2022
Tax Year 2013 to 2021 | CANADA        
Income Tax Contingency [Line Items]        
Increase (decrease) in income taxes       $ 300
Tax Year 2023        
Income Tax Contingency [Line Items]        
Increase (decrease) in income taxes $ 25   $ 75  
Tax Year 2022        
Income Tax Contingency [Line Items]        
Increase (decrease) in income taxes   $ 227   $ 375