XML 47 R35.htm IDEA: XBRL DOCUMENT v3.19.2
SHAREHOLDERS` EQUITY (Details) - Stock Options Summary
12 Months Ended
May 31, 2019
$ / shares
shares
Range Of Exercise Price $0.82 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Range of Exercise Price, Minimum $ 0.82
Range of Exercise Price, Maximum $ 0.82
Options Outstanding, Number (in Shares) | shares 295,375
Options Outstanding, Weighted Average Remaining Contractual Life 5 years 262 days
Options Outstanding, Weighted Average Exercise Price $ 0.82
Options Exercisable, Number (in Shares) | shares 283,375
Options Exercisable, Weighted Average Exercise Price $ 0.82
Range Of Exercise Price $0.85 - $1.04 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Range of Exercise Price, Minimum 0.85
Range of Exercise Price, Maximum $ 1.04
Options Outstanding, Number (in Shares) | shares 47,500
Options Outstanding, Weighted Average Remaining Contractual Life 1 year 153 days
Options Outstanding, Weighted Average Exercise Price $ 1.02
Options Exercisable, Number (in Shares) | shares 35,500
Options Exercisable, Weighted Average Exercise Price $ 1.02
Range Of Exercise Price $1.20 - $1.61 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Range of Exercise Price, Minimum 1.20
Range of Exercise Price, Maximum $ 1.61
Options Outstanding, Number (in Shares) | shares 330,000
Options Outstanding, Weighted Average Remaining Contractual Life 6 years 204 days
Options Outstanding, Weighted Average Exercise Price $ 1.26
Options Exercisable, Number (in Shares) | shares 233,750
Options Exercisable, Weighted Average Exercise Price $ 1.26
Range Of Exercise Price $2.25 - $3.90 [Member]  
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]  
Range of Exercise Price, Minimum 2.25
Range of Exercise Price, Maximum $ 3.90
Options Outstanding, Number (in Shares) | shares 803,334
Options Outstanding, Weighted Average Remaining Contractual Life 8 years
Options Outstanding, Weighted Average Exercise Price $ 2.93
Options Exercisable, Number (in Shares) | shares 154,000
Options Exercisable, Weighted Average Exercise Price $ 2.93