Income Taxes - Summary of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Aug. 31, 2019
Deferred tax assets:
General business credit	$ 6,472	$ 1,789
NOL carryover	2,003	792
Lease liabilities	16,635
Deferred rent		602
Tenant allowance		324
State tax deduction	12	29
Other	535	14
Gross deferred tax assets	25,657	3,550
Deferred tax liabilities:
Basis difference on fixed assets	(4,593)	(2,408)
Right-of-use assets	(15,496)	(15)
Gross deferred tax liabilities	(20,089)	(2,423)
Valuation allowance	$ (5,568)
Net deferred tax		$ 1,127