Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Aug. 31, 2019	Aug. 31, 2018
Accounts receivable, reserves	$ 10,511	$ 3,490
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	40,104,192	39,264,849
Common stock, shares outstanding (in shares)	38,117,840	38,192,586
Treasury stock, shares (in shares)	1,986,352	1,072,263