v3.26.1
11. STOCK-BASED COMPENSATION - Weighted average assumptions (Details) - USD ($)
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Other information      
Income tax benefit recognized from allocation of share-based compensation expense $ 0 $ 0  
Windfall tax benefits realized 0 $ 0  
Unrecognized compensation costs $ 6,000,000    
Weighted average period of recognition of unrecognized compensation costs 1 year 9 months 25 days    
Weighted average fair value per underlying share of options granted (in dollars per share) $ 4.42 $ 2.23 $ 2.13
Minimum      
Stock-based compensation      
Expected life 7 years 1 month 6 days 4 years 10 months 24 days 4 years 6 months
Maximum      
Stock-based compensation      
Expected life 7 years 3 months 18 days 5 years 4 years 10 months 24 days
Employee Stock Option      
Stock-based compensation      
Risk-free interest rate, low end of range (as a percent) 3.90% 4.05% 3.69%
Risk-free interest rate, high end of range (as a percent) 4.14% 4.48% 4.80%
Volatility, low end of range (as a percent) 84.40% 91.00% 80.70%
Volatility, high end of range (as a percent) 96.70% 96.70% 85.90%
Employee Stock Option | Minimum      
Stock-based compensation      
Expected life 7 years 25 days 4 years 10 months 20 days 4 years 5 months 15 days
Employee Stock Option | Maximum      
Stock-based compensation      
Expected life 7 years 3 months 18 days 5 years 4 years 11 months 8 days
Employee stock purchase plan options      
Stock-based compensation      
Risk-free interest rate, low end of range (as a percent) 3.81% 4.44% 5.26%
Risk-free interest rate, high end of range (as a percent) 4.30% 5.41% 5.38%
Expected life 6 months 6 months 6 months
Volatility, low end of range (as a percent) 27.10% 6.10% 28.80%
Volatility, high end of range (as a percent) 34.40% 12.40% 83.90%