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STOCKHOLDERS EQUITY AND STOCK-BASED COMPENSATION (Details 5) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
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May 31, 2022 USD ($) $ / shares shares
$1.34-$19.85 |
Options outstanding, ending (in thousands) | shares | shares | 1,597
Weighted average remaining contractual life (Years) options outstanding | 4 years 1 month 13 days
Weighted average exercise price outstanding, ending | $ / shares | $ 2.70
Option exercisable shares (in thousands) | shares | 1,042
Weighted average remaining contractual life (Years) options exercisable | 3 years 5 months 19 days
Weighted average exercise price for options exercisable | $ / shares | $ / shares | $ 2.22
Aggregate intrinsic value for options exercisable | | $ | $ 6,440
$1.34 |
Options outstanding, ending (in thousands) | shares | shares | 51
Weighted average remaining contractual life (Years) options outstanding | 5 years 4 months 20 days
Weighted average exercise price outstanding, ending | $ / shares | $ 1.34
Option exercisable shares (in thousands) | shares | 51
Weighted average exercise price for options exercisable | $ / shares | $ / shares | $ 1.34
Weighted average remaining contractual life (Years) options exercisable | 5 years 4 months 20 days
$1.64-$1.86 |
Options outstanding, ending (in thousands) | shares | shares | 659
Weighted average remaining contractual life (Years) options outstanding | 4 years 7 days
Weighted average exercise price outstanding, ending | $ / shares | $ 1.70
Option exercisable shares (in thousands) | shares | 419
Weighted average exercise price for options exercisable | $ / shares | $ / shares | $ 1.69
Weighted average remaining contractual life (Years) options exercisable | 3 years 8 months 15 days
$2.03-$2.42 |
Options outstanding, ending (in thousands) | shares | shares | 471
Weighted average remaining contractual life (Years) options outstanding | 3 years 3 months 29 days
Weighted average exercise price outstanding, ending | $ / shares | $ 2.25
Option exercisable shares (in thousands) | shares | 408
Weighted average exercise price for options exercisable | $ / shares | $ / shares | $ 2.26
Weighted average remaining contractual life (Years) options exercisable | 3 years 2 months 15 days
$2.76-$2.93 |
Options outstanding, ending (in thousands) | shares | shares | 215
Weighted average remaining contractual life (Years) options outstanding | 5 years 7 months 6 days
Weighted average exercise price outstanding, ending | $ / shares | $ 2.91
Option exercisable shares (in thousands) | shares | 56
Weighted average exercise price for options exercisable | $ / shares | $ / shares | $ 2.87
Weighted average remaining contractual life (Years) options exercisable | 4 years 1 month 13 days
$3.46-$3.93 |
Options outstanding, ending (in thousands) | shares | shares | 104
Weighted average remaining contractual life (Years) options outstanding | 2 years 2 months 1 day
Weighted average exercise price outstanding, ending | $ / shares | $ 3.84
Option exercisable shares (in thousands) | shares | 104
Weighted average exercise price for options exercisable | $ / shares | $ / shares | $ 3.84
Weighted average remaining contractual life (Years) options exercisable | 2 years 2 months 1 day
$9.45-$19.85 |
Options outstanding, ending (in thousands) | shares | shares | 97
Weighted average remaining contractual life (Years) options outstanding | 6 years 9 months 18 days
Weighted average exercise price outstanding, ending | $ / shares | $ 10.57
Option exercisable shares (in thousands) | shares | 4
Weighted average exercise price for options exercisable | $ / shares | $ / shares | $ 14.02
Weighted average remaining contractual options exercisable | 6 years 7 months 20 days

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