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9. STOCK COMPENSATION (Details - Stock compensation) - USD ($)
3 Months Ended 6 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Total stock-based compensation expense $ 167,042 $ 326,536 $ 251,249 $ 653,072
Weighted average number of common shares outstanding- basic and diluted 12,070,592 1,317,418 10,845,049 1,294,206
Basic and diluted loss per common share attributable to stock-based compensation expense $ (0.15) $ (1.29) $ (0.29) $ (2.91)
Vesting of stock options and restricted stock units [Member]        
Total stock-based compensation expense $ 167,042 $ 326,536 $ 251,249 $ 653,072
Share-Based Compensation [Member]        
Basic and diluted loss per common share attributable to stock-based compensation expense $ (0.01) $ (0.25) $ (0.02) $ (0.50)