SIGNIFICANT ACCOUNTING POLICIES - Schedule of Other Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021	Aug. 31, 2021
Other intangible assets
Restructuring Cost and Reserve [Line Items]
Acquisition Value	$ 10,352		$ 10,352		$ 8,650
Accumulated Amortization	2,635		2,635		2,186
Net Book Value	7,717		7,717		$ 6,464
Amortization of intangible assets	160	$ 137	$ 449	$ 412
Simulations Plus | ERP
Restructuring Cost and Reserve [Line Items]
Amortization Period			15 years
Acquisition Value	1,702		$ 1,702
Accumulated Amortization	52		52
Net Book Value	1,650		$ 1,650
Cognigen | Customer relationships
Restructuring Cost and Reserve [Line Items]
Amortization Period			8 years		8 years
Acquisition Value	1,100		$ 1,100		$ 1,100
Accumulated Amortization	1,065		1,065		963
Net Book Value	35		35		137
Cognigen | Trade name
Restructuring Cost and Reserve [Line Items]
Acquisition Value	500		500		500
Accumulated Amortization	0		0		0
Net Book Value	500		$ 500		$ 500
Cognigen | Covenants not to compete
Restructuring Cost and Reserve [Line Items]
Amortization Period			5 years		5 years
Acquisition Value	50		$ 50		$ 50
Accumulated Amortization	50		50		50
Net Book Value	0		$ 0		$ 0
Developed technologies–DILIsym acquisition | Customer relationships
Restructuring Cost and Reserve [Line Items]
Amortization Period			10 years		10 years
Acquisition Value	1,900		$ 1,900		$ 1,900
Accumulated Amortization	951		951		807
Net Book Value	949		949		1,093
Developed technologies–DILIsym acquisition | Trade name
Restructuring Cost and Reserve [Line Items]
Acquisition Value	860		860		860
Accumulated Amortization	0		0		0
Net Book Value	860		$ 860		$ 860
Developed technologies–DILIsym acquisition | Covenants not to compete
Restructuring Cost and Reserve [Line Items]
Amortization Period			4 years		4 years
Acquisition Value	80		$ 80		$ 80
Accumulated Amortization	80		80		80
Net Book Value	0		$ 0		$ 0
Developed technologies–Lixoft acquisition | Customer relationships
Restructuring Cost and Reserve [Line Items]
Amortization Period			14 years		14 years
Acquisition Value	2,550		$ 2,550		$ 2,550
Accumulated Amortization	394		394		258
Net Book Value	2,156		2,156		2,292
Developed technologies–Lixoft acquisition | Trade name
Restructuring Cost and Reserve [Line Items]
Acquisition Value	1,550		1,550		1,550
Accumulated Amortization	0		0		0
Net Book Value	1,550		$ 1,550		$ 1,550
Developed technologies–Lixoft acquisition | Covenants not to compete
Restructuring Cost and Reserve [Line Items]
Amortization Period			3 years		3 years
Acquisition Value	60		$ 60		$ 60
Accumulated Amortization	43		43		28
Net Book Value	$ 17		$ 17		$ 32