Earnings Per Share Reconciliation of Numerator and Denominator of the basic and diluted earnings per share computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									80	68	53
Net income available to common stockholders	$ (8,456)	$ 11,052	$ 4,025	$ 4,858	$ (926)	$ (1,982)	$ 4,229	$ (2,018)	$ 11,479	$ (697)	$ 3,669
Basic weighted average number of common shares	23,309	23,278	23,222	23,107	23,055	18,559	17,858	17,720	23,229	19,233	17,513
Diluted weighted average number of common shares	23,309	23,453	23,357	23,287	23,055	18,559	17,888	17,720	23,369	19,233	17,526
Basic earnings (loss) per share	$ (0.36)	$ 0.47	$ 0.17	$ 0.21	$ (0.04)	$ (0.11)	$ 0.24	$ (0.11)	$ 0.49	$ (0.04)	$ 0.21
Diluted earnings (loss) per share	$ (0.36)	$ 0.47	$ 0.17	$ 0.21	$ (0.04)	$ (0.11)	$ 0.24	$ (0.11)	$ 0.49	$ (0.04)	$ 0.21
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									140	0	13