v3.26.1
Income Taxes - Schedule of Reconciliation of Provision for Income Taxes from Continuing Operations For Current Fiscal Year (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2024
Amount      
U.S Federal Statutory Tax Rate $ (1,924) $ 10 $ (2,587)
State and Local Income Taxes, Net of Federal Income Tax Effect 36 14 (132)
Global intangible low-tax income 20    
Research & Development Credits (151) (149) (203)
Changes in Valuation Allowances 1,565 (192) 2,257
Stock compensation (104) 249 436
Executive compensation limitation 550    
Other 77    
Total income tax expense/(benefit) $ 45 $ 123 $ (70)
Percent      
U.S Federal Statutory Tax Rate 21.00%    
State and Local Income Taxes, Net of Federal Income Tax Effect (c) (0.40%)    
Global intangible low-tax income (0.20%)    
Research & Development Credits 1.60%    
Changes in Valuation Allowances (17.10%)    
Stock Compensation 1.10%    
Executive compensation limitation (6.00%)    
Other (0.80%)    
Effective Tax Rate (0.50%) 267.40% 0.60%
CHINA      
Amount      
Statutory tax rate Difference between China and United States $ (24)    
Percent      
Statutory tax rate Difference between China and United States 0.30%