6. SHAREHOLDERS EQUITY (Details - Dividends) - USD ($)	9 Months Ended		12 Months Ended
	May 31, 2018	May 31, 2017	Aug. 31, 2017
Total dividends paid amount	$ 3,117,393	$ 2,585,043	$ 3,448,489
FY 2018 1st Qtr [Member]
Record Date	Nov. 13, 2017
Distribution Date	Nov. 20, 2017
Number of Shares Outstanding on Record Date	17,284,792
Dividend per Share	$ 0.06
Total dividends paid amount	$ 1,037,088
FY 2018 2nd Qtr [Member]
Record Date	Jan. 26, 2018
Distribution Date	Feb. 02, 2018
Number of Shares Outstanding on Record Date	17,317,752
Dividend per Share	$ 0.06
Total dividends paid amount	$ 1,039,065
FY 2018 3rd Qtr [Member]
Record Date	Apr. 25, 2018
Distribution Date	May 02, 2018
Number of Shares Outstanding on Record Date	17,354,005
Dividend per Share	$ 0.06
Total dividends paid amount	$ 1,041,240
FY 2017 1st Qtr [Member]
Record Date			Nov. 10, 2016
Distribution Date			Nov. 17, 2016
Number of Shares Outstanding on Record Date			17,226,478
Dividend per Share			$ 0.05
Total dividends paid amount			$ 861,324
FY 2017 2nd Qtr [Member]
Record Date			Jan. 30, 2017
Distribution Date			Feb. 06, 2017
Number of Shares Outstanding on Record Date			17,233,758
Dividend per Share			$ 0.05
Total dividends paid amount			$ 861,688
FY 2017 3rd Qtr [Member]
Record Date			May 08, 2017
Distribution Date			May 15, 2017
Number of Shares Outstanding on Record Date			17,240,626
Dividend per Share			$ 0.05
Total dividends paid amount			$ 862,031
FY 2017 4th Qtr [Member]
Record Date			Jul. 28, 2017
Distribution Date			Aug. 04, 2017
Number of Shares Outstanding on Record Date			17,268,920
Dividend per Share			$ 0.05
Total dividends paid amount			$ 863,446