Activity - Stock Option, Restricted Stock and Restricted Stock Units (Details) - $ / shares	6 Months Ended		12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Oct. 31, 2016	Oct. 31, 2015
Employee Stock Option [Member]
Number of Shares
Options, Outstanding Beginning of Period	89,666	90,666	90,666
Granted	0
Exercised	(8,000)	0
Canceled	(23,500)	(1,000)
Options, Outstanding End of Period	58,166	89,666	89,666	90,666
Weighted-Average Exercise Price
Options, Outstanding, Beginning of Period, Weighted Average Exercise Price Per Share	$ 9.67	$ 9.70	$ 9.70
Granted, Weighted Average Exercise Price Per Share	0
Exercised, Weighted Average Exercise Price Per Share	10	0
Forfeitures and Expirations in Period, Weighted Average Exercise Price	13.38	12
Options, Outstanding, End of Period, Weighted Average Exercise Price Per Share	$ 8.16	$ 9.67	$ 9.67	$ 9.70
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	3 years 1 month 18 days	3 years 7 months 3 days	3 years 1 month 2 days	4 years 1 month 7 days
Restricted Stock [Member]
Weighted Average Grant Date Fair Value Restricted Stock and RSUs
Nonvested, Beginning of Period	376,340	124,255	124,255
Stock, Granted	245,932	309,251
Stock, Vested	(157,512)	(21,458)
Stock, Forfeited	(3,443)	(1,500)
Nonvested, End of Period	461,317	410,548	376,340	124,255
Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period	$ 6.40	$ 13.77	$ 13.77
Granted, Weighted Average Grant Date Fair Value	7.93	4.28
Vested, Weighted Average Grant Date Fair Value	5.71	16.64
Forfeited, Weighted Average Grant Date Fair Value	10.10	10
Nonvested, Weighted Average Grant Date Fair Value, End of Period	$ 7.19	$ 6.48	$ 6.40	$ 13.77
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	1 year 10 months	2 years 2 months 30 days	1 year 10 months	2 years 3 months 10 days
Restricted Stock Units (RSUs) [Member]
Weighted Average Grant Date Fair Value Restricted Stock and RSUs
Nonvested, Beginning of Period	21,539	0	0
Stock, Granted	29,253	21,539
Stock, Vested	(13,574)	0
Stock, Forfeited	0	0
Nonvested, End of Period	37,218	21,539	21,539	0
Nonvested, Weighted Average Grant Date Fair Value, Beginning of Period	$ 4.17	$ 0	$ 0
Granted, Weighted Average Grant Date Fair Value	8.62	4
Vested, Weighted Average Grant Date Fair Value	4	0
Forfeited, Weighted Average Grant Date Fair Value	0	0
Nonvested, Weighted Average Grant Date Fair Value, End of Period	$ 7.53	$ 4	$ 4.17	$ 0