Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	May 31, 2018	Nov. 30, 2017
Assets
Allowance for accounts receivable	$ 720	$ 676
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)	45,503,468	47,281,035
Common stock, shares outstanding (in shares)	45,503,468	47,281,035