Leases - Summary of Finance Lease Assets, Net (Details) - USD ($) $ in Thousands	Aug. 31, 2021	Aug. 31, 2020
Lessee Lease Description [Line Items]
Property and equipment, gross	$ 68,328	$ 55,553
Accumulated depreciation	(14,443)	(10,012)
Total property and equipment – net	53,885	45,541
Finance Lease Assets
Lessee Lease Description [Line Items]
Property and equipment, gross	6,128	6,117
Accumulated depreciation	(2,778)	(2,178)
Total property and equipment – net	$ 3,350	$ 3,939