Note 17 - Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Aug. 31, 2019	Aug. 31, 2018
Deferred tax assets:
Receivable reserve	$ 1,517	$ 599
Depreciation on property, equipment and leasehold improvements	2,858	1,032
Deferred rent	9,454	7,711
Stock-based compensation	13,755	14,827
Purchased intangible assets, including acquired technology	(27,116)	(24,059)
Other	7,103	9,606
Total deferred tax assets	7,571	9,716
Deferred tax liabilities:
Stock-based compensation	(1,067)	(946)
Purchased intangible assets, including acquired technology	17,188	22,429
Other	270	(293)
Total deferred tax liabilities	$ 16,391	$ 21,190