Note 17 - Income Taxes - Significant Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017
Deferred tax assets:
Receivable reserve	$ 599	$ 811
Depreciation on property, equipment and leasehold improvements	1,032	2,220
Deferred rent	7,711	11,615
Stock-based compensation	14,827	20,117
Purchased intangible assets, including acquired technology	(24,059)	(32,742)
Other	9,606	8,059
Total deferred tax assets	9,716	10,080
Deferred tax liabilities:
Stock-based compensation	(946)	(815)
Purchased intangible assets, including acquired technology	22,429	26,231
Other	(293)	1,858
Total deferred tax liabilities	$ 21,190	$ 27,274