v3.26.1
Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
May 31, 2026
May 31, 2025
May 31, 2024
Amount      
Income tax benefit at federal statutory tax rate of 21.0% and 21.0%, respectively $ (7,623) $ (7,147) $ (40,244)
State income taxes, net of Federal tax benefit 90 10 (3,016)
Foreign tax effects 16    
Effect of cross-border tax laws 104    
Impact of Non-U.S. operations   150 2,440
Research and development tax credit 422 (497) (907)
Meals and entertainment   250 244
Goodwill impairment   0 4,867
Non-deductible executive compensation   294 201
Change in valuation allowance 6,475 5,760 26,921
Stock based compensation   1,325 1,357
Nontaxable or nondeductible items 756    
Other adjustments 202 (184) 848
Income tax expense (benefit) $ 442 $ (39) $ (7,289)
Rate      
Statutory Rate 21.00%    
State & local income tax, net of federal (national) income tax effect (0.25%)    
Foreign tax effects (0.05%)    
Effect of cross-border tax laws (0.29%)    
Research & development tax credit (1.16%)    
Changes in valuation allowance (17.84%)    
Nontaxable or nondeductible items (2.08%)    
Other adjustments (0.56%)    
Total income tax expense (1.23%)