Commitments and Contingencies - Additional Information (Details) - USD ($)	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Lease Expiration Date	Sep. 30, 2029
Rent expense	$ 3,285,000	$ 3,242,000
Maximum
Monthly Operating Lease Rental Payment	67,000
Minimum
Monthly Operating Lease Rental Payment	$ 1,000