Note 15 - Income Taxes - Significant Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Feb. 28, 2018	Aug. 31, 2017
Deferred tax assets:
Receivable reserve	$ 573	$ 811
Depreciation on property, equipment and leasehold improvements	2,495	2,220
Deferred rent	7,761	11,615
Stock-based compensation	13,687	20,117
Purchased intangible assets, including acquired technology	(22,359)	(32,742)
Other	3,630	8,059
Total deferred tax assets	5,787	10,080
Deferred tax liabilities:
Stock-based compensation	(854)	(815)
Depreciation on property, equipment and leasehold improvements	551	168
Purchased intangible assets, including acquired technology	25,265	26,231
Other	726	1,690
Total deferred tax liabilities	$ 25,688	$ 27,274