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Sale-Leaseback Financing Transaction - Narrative (Details)
$ in Thousands
 3 Months Ended
Jul. 31, 2023
USD ($)
renewalOption
Jul. 31, 2022
USD ($)
Apr. 30, 2023
USD ($)
Financing Liability [Abstract]      
Term of agreement 20 years    
Number of renewal options | renewalOption 4    
Renewal term 5 years    
Initial basic monthly rent $ 158    
Annual rental increase, as a percent 2.00%    
Discount rate 4.75%    
Gain (loss) on sale leaseback agreement $ 0    
Financing liability 28,617   $ 28,774
Debt issuance costs on financing liability 692   708
Current portion of financing liability 659   642
Long-term portion of financing liability 27,958   28,132
Interest expense on financing liability 325 $ 332  
Financing Liability [Line Items]      
Property, plant and equipment, at cost $ 63,023   $ 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