v3.26.1
Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Income Tax Disclosure [Abstract]    
Computed expected tax benefit (21.00%)  
Tax Jurisdiction of Domicile [Extensible Enumeration] Tax Jurisdiction of Domicile [Extensible Enumeration]  
Computed expected tax benefit, value $ (10,272)  
State income taxes, net of federal benefit 0.40% [1] 3.70%
State income taxes, net of federal benefit, value $ 186  
Expiration of tax credits 1.10%  
Expiration of tax credits, value $ 513  
Federal research and development tax credits  
Foreign rate differential  
Change in valuation allowance 12.50%  
Change in valuation allowance, value $ 6,087  
Stock compensation 1.60%  
Stock compensation, value $ 757  
Change in fair value of derivative 2.50%  
Change in fair value of derivative $ 1,195  
Other non-deductible expenses 0.70%  
Stock compensation, value $ 320  
Proceeds of sale of New Jersey tax benefits   (3.60%)
Deferred true-up  
Deferred true-up, value $ 8  
Expiration of net operating loss due to dissolution of subsidiary   8.80%
Expiration of net operating loss 2.50% (6.70%)
Expiration of net operating loss, value $ 1,206  
Income tax (benefit) 0.00% (4.60%)
Income tax (benefit), value $ (1,034)
Computed expected tax benefit   (21.00%)
State income taxes, net of federal benefit (0.40%) [1] (3.70%)
Other non-deductible expenses   (0.10%)
Other expiration of net operating loss (2.50%) 6.70%
Increase in valuation allowance   8.30%
[1] For the year ended April 30, 2026, state taxes in the following states listed below made up the majority (greater than 50% of the tax effect):