Note 15 - Income Taxes - Significant Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Feb. 28, 2019	Aug. 31, 2018
Receivable reserve	$ 571	$ 599
Depreciation on property, equipment and leasehold improvements	3,110	1,032
Deferred rent	7,410	7,711
Stock-based compensation	13,333	14,827
Purchased intangible assets, including acquired technology	(25,269)	(24,059)
Other	7,582	9,606
Total deferred tax assets	6,737	9,716
Stock-based compensation	(1,077)	(946)
Purchased intangible assets, including acquired technology	20,368	22,429
Other	929	(293)
Total deferred tax liabilities	$ 20,220	$ 21,190