XML 69 R40.htm IDEA: XBRL DOCUMENT v3.26.1
Summary of Significant Accounting Policies - Additional Information (Detail)
12 Months Ended
Dec. 22, 2021
USD ($)
Apr. 30, 2026
USD ($)
segment
shares
Apr. 30, 2025
USD ($)
shares
Significant Accounting Policies [Line Items]      
Unbilled receivables   $ 14,163,000 $ 12,693,000
Property plant and equipment impairment charges   0 0
Goodwill and intangible asset impairment   $ 0 0
Sale agreement for property $ 30,275,000    
Term of agreement   20 years  
Research and development costs   $ 898,000 919,000
Advertising costs   $ 1,502,000 $ 912,000
Anti-dilutive options exclude from computation of earning per share | shares   0 0
Awards granted (in shares) | shares   0 0
Number of business segment | segment   2  
Restricted Stock Units (RSUs)      
Significant Accounting Policies [Line Items]      
Granted (in shares) | shares   72,728 62,326
Restricted stock units granted (in shares) | shares     62,326
Customer Concentration Risk | Sales Revenue, Segment | LPG      
Significant Accounting Policies [Line Items]      
Concentration risk percentage   34.00% 41.00%
Customer Concentration Risk | Accounts Receivable | LPG      
Significant Accounting Policies [Line Items]      
Concentration risk percentage   19.00% 26.00%
Other Noncurrent Assets      
Significant Accounting Policies [Line Items]      
Assets held in trust account for non-qualified benefit plans included in other assets   $ 4,307,000 $ 3,263,000
Kewaunee Scientific Corporation | Nu Aire, Inc      
Significant Accounting Policies [Line Items]      
Percentage of controlling interest in subsidiaries   100.00%  
Kewaunee Scientific Corporation | Kewaunee Labway Asia Pte. Ltd.      
Significant Accounting Policies [Line Items]      
Percentage of controlling interest in subsidiaries   100.00%  
Kewaunee Scientific Corporation | Kewaunee Scientific Corporation Singapore Pte. Ltd.      
Significant Accounting Policies [Line Items]      
Percentage of controlling interest in subsidiaries   100.00%  
Kewaunee Scientific Corporation | Kewaunee Labway India Pvt. Ltd.      
Significant Accounting Policies [Line Items]      
Percentage of controlling interest in subsidiaries   88.00%  
Kewaunee Scientific Corporation | Koncepo Scientech International      
Significant Accounting Policies [Line Items]      
Percentage of controlling interest in subsidiaries   80.00%  
Kewaunee Scientific Corporation Singapore Pte. Ltd. | Kequip Global Lab Solutions Pvt. Ltd.      
Significant Accounting Policies [Line Items]      
Percentage of controlling interest in subsidiaries   70.00%