Annual report [Section 13 and 15(d), not S-K Item 405]

Equity Incentive Plan - (Details Narrative)

v3.26.1
Equity Incentive Plan - (Details Narrative)
$ / shares in Units, shares in Thousands, $ in Thousands
 1 Months Ended 12 Months Ended
May 31, 2025
shares
May 31, 2026
USD ($)
Plan
$ / shares
shares
May 31, 2025
USD ($)
$ / shares
shares
Share-based Compensation      
Number of active plans | Plan   1  
Stock-based compensation | $   $ 1,630 $ 1,612
Expected to be recognized over weighted-average period   1 year 7 months 6 days  
Options outstanding, vested 28,600 26,900 28,600
Options outstanding, nonvested 9,700 23,200 9,700
Equity Instruments | Selling, General and Administrative Expenses      
Share-based Compensation      
Stock-based compensation | $   $ 1,600 $ 1,600
Stock Options and Warrants      
Share-based Compensation      
Vested during the period, grant date fair value | $   900 $ 1,300
Unrecognized compensation expense | $   $ 5,800  
Employee Stock Option      
Share-based Compensation      
Stock option granted, exercise price | $ / shares   $ 0.28 $ 0.17
Stock options exercised, exercise price | $ / shares   $ 0.21 $ 0.21
Employee Stock Option | Tranche Two      
Share-based Compensation      
Stock option vested, Shares   15,000  
Award vesting period   4 years  
Employee Stock Option | Tranche Three      
Share-based Compensation      
Stock option vested, Shares   3,200  
Award vesting period   1 year  
RSU and PSU      
Share-based Compensation      
Unrecognized compensation expense | $   $ 1,400  
Performance target level percentage for non-vested equity-based payment instruments   100.00%  
PSU      
Share-based Compensation      
Expected to be recognized over weighted-average period   2 years  
Granted (in shares) [1]     3,500
PSU | Maximum      
Share-based Compensation      
Performance target level percentage for non-vested equity-based payment instruments 100.00%    
PSU | Minimum      
Share-based Compensation      
Performance target level percentage for non-vested equity-based payment instruments 0.00%    
2012 Equity Incentive Plan      
Share-based Compensation      
Annual increase in shares authorized, as a percent of outstanding shares   1.00%  
Number of shares authorized for issuance   79,300  
Management, Employees And Consultants      
Share-based Compensation      
Stock option granted, Shares   18,200  
Management, Employees And Consultants | Maximum      
Share-based Compensation      
Stock option granted, exercise price | $ / shares   $ 0.32  
Stock options grant date fair value | $ / shares   0.27  
Management, Employees And Consultants | Minimum      
Share-based Compensation      
Stock option granted, exercise price | $ / shares   0.26  
Stock options grant date fair value | $ / shares   $ 0.23  
[1] The number of PSUs disclosed in this table are at the target level of 100%.