Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2019	Nov. 30, 2018
Assets
Allowance for accounts receivable	$ 674	$ 840
Stockholders' Equity:
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)	200,000,000	200,000,000
Common stock, shares issued (in shares)	44,785,586	45,114,935
Common stock, shares outstanding (in shares)	44,785,586	45,114,935