SEGMENT AND GEOGRAPHIC REPORTING - Schedule of Revenue by Division (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 14,959	$ 12,777	$ 42,172	$ 36,625
Revenue benchmark | Product concentration risk
Segment Reporting Information [Line Items]
Concentration percentage	100.00%	100.00%	100.00%	100.00%
Simulations Plus
Segment Reporting Information [Line Items]
Revenue	$ 9,412	$ 7,916	$ 23,916	$ 19,994
Simulations Plus | Revenue benchmark | Product concentration risk
Segment Reporting Information [Line Items]
Concentration percentage	63.00%	62.00%	57.00%	55.00%
Cognigen
Segment Reporting Information [Line Items]
Revenue	$ 2,745	$ 2,536	$ 7,685	$ 7,987
Cognigen | Revenue benchmark | Product concentration risk
Segment Reporting Information [Line Items]
Concentration percentage	18.00%	20.00%	18.00%	22.00%
Developed technologies–DILIsym acquisition
Segment Reporting Information [Line Items]
Revenue	$ 1,723	$ 1,331	$ 5,542	$ 4,817
Developed technologies–DILIsym acquisition | Revenue benchmark | Product concentration risk
Segment Reporting Information [Line Items]
Concentration percentage	12.00%	10.00%	13.00%	13.00%
Developed technologies–Lixoft acquisition
Segment Reporting Information [Line Items]
Revenue	$ 1,079	$ 994	$ 5,029	$ 3,827
Developed technologies–Lixoft acquisition | Revenue benchmark | Product concentration risk
Segment Reporting Information [Line Items]
Concentration percentage	7.00%	8.00%	12.00%	10.00%