Consolidated Balance Sheets - Unaudited (Parentheticals) - USD ($) $ in Thousands	Nov. 30, 2021	Aug. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable reserve	$ 4,433	$ 6,431
Preferred stock, par value (in USD per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	10,000,000	10,000,000
Preferred stock, issued (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	150,000,000	150,000,000
Common stock, issued (in shares)	41,372,890	41,163,192
Common stock, outstanding (in shares)	37,772,170	37,615,419
Treasury stock (in shares)	3,600,720	3,547,773