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Sale-Leaseback Financing Transaction - Narrative (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Oct. 31, 2023
USD ($)
Oct. 31, 2022
USD ($)
Oct. 31, 2023
USD ($)
renewalOption
Oct. 31, 2022
USD ($)
Apr. 30, 2023
USD ($)
Financing Liability [Abstract]          
Term of agreement 20 years   20 years    
Number of renewal options | renewalOption     4    
Renewal term 5 years   5 years    
Initial basic monthly rent     $ 158    
Annual rental increase, as a percent     2.00%    
Discount rate 4.75%   4.75%    
Gain (loss) on sale leaseback agreement     $ 0    
Financing liability $ 28,459   28,459   $ 28,774
Debt issuance costs on financing liability 677   677   708
Current portion of financing liability 677   677   642
Long-term portion of financing liability 27,782   27,782   28,132
Interest expense on financing liability 322 $ 330 647 $ 662  
Financing Liability [Line Items]          
Property, plant and equipment, at cost 63,733   $ 63,733   $ 61,368
Building          
Financing Liability [Line Items]          
Useful Life (in years)     20 years    
Land          
Financing Liability [Line Items]          
Property, plant and equipment, at cost $ 41   $ 41