Activity - Stock Option, Restricted Stock and Restricted Stock Units (Details) - $ / shares	3 Months Ended	9 Months Ended		12 Months Ended
	Oct. 31, 2017	Jul. 31, 2018	Jul. 31, 2017	Oct. 31, 2016
Employee Stock Option [Member]
Number of Shares
Options, Outstanding Beginning of Period	58,166	58,166	89,666
Granted		0
Exercised		(12,000)	(8,000)
Canceled		(3,000)	(23,500)
Options, Outstanding End of Period	58,166	43,166	58,166	89,666
Weighted-Average Exercise Price
Options, Outstanding, Beginning of Period, Weighted Average Exercise Price Per Share	$ 8.16	$ 8.16	$ 9.67
Granted, Weighted Average Exercise Price Per Share		0.00
Exercised, Weighted Average Exercise Price Per Share		3.26	9.79
Forfeitures and Expirations in Period, Weighted Average Exercise Price		12.04	13.38
Options, Outstanding, End of Period, Weighted Average Exercise Price Per Share	$ 8.16	$ 9.33	$ 8.16	$ 9.67
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 6 months 10 days	1 year 10 months	2 years 9 months 10 days	3 years 16 days
Restricted Stock [Member]
Weighted-Average Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	1 year 7 months 5 days
Weighted Average Grant Date Fair Value Restricted Stock and RSUs
Nonvested, Beginning of Period	458,867	441,282	376,340
Stock, Granted		296,163	245,932
Stock, Vested		(200,427)	(158,512)
Stock, Forfeited		(41,055)	(4,893)
Nonvested, End of Period	441,282	495,963	458,867	376,340
Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period	$ 7.19	$ 7.07	$ 6.11
Granted, Weighted Average Grant Date Fair Value		8.12	7.93
Vested, Weighted Average Grant Date Fair Value		7.51	5.71
Forfeited, Weighted Average Grant Date Fair Value		7.08	9.20
Nonvested, Weighted Average Grant Date Fair Value, End of Period	$ 7.07	$ 7.52	$ 7.19	$ 6.11
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms		1 year 11 months 12 days	1 year 9 months 10 days	1 year 10 months
Restricted Stock Units (RSUs) [Member]
Weighted Average Grant Date Fair Value Restricted Stock and RSUs
Nonvested, Beginning of Period	37,218	35,815	21,539
Stock, Granted		17,618	29,253
Stock, Vested		(15,341)	(13,574)
Stock, Forfeited		(11,968)	0
Nonvested, End of Period	35,815	26,124	37,218	21,539
Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period	$ 7.67	$ 7.69	$ 4.17
Granted, Weighted Average Grant Date Fair Value		7.90	8.62
Vested, Weighted Average Grant Date Fair Value		8.30	4.17
Forfeited, Weighted Average Grant Date Fair Value		6.18	0.00
Nonvested, Weighted Average Grant Date Fair Value, End of Period	$ 7.69	$ 8.17	$ 7.67	$ 4.17
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	1 year 9 months 25 days	1 year 8 months 20 days	2 years 1 month 7 days	1 year 9 months 12 days