Equity incentive plan (Details) - USD ($)				12 Months Ended
	Sep. 04, 2014	Apr. 04, 2004	Sep. 10, 1998	Oct. 31, 2015	Oct. 31, 2014
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan term	10 years
Vesting term	5 years
Vesting rate	20.00%
No. of Options Outstanding
Options outstanding beginning of period				246,000
Options granted during period	246,000
Options forfeited/cancelled during period				(2,100)
Options outstanding end of period				243,900	246,000
Options expected to vest				238,620
Options exercisable at end of period				48,780
Exercise Price
Options outstanding beginning of period				$ 18.45
Options granted during period	$ 18.45
Options forfeited/cancelled during period				$ 18.45
Options outstanding end of period				18.45	$ 18.45
Estimated fair value of options granted				$ 1.91
Such value was estimated on the grant date using a binomial lattice option pricing model using the following assumptions:
Expected volatility				30.50%
Risk-free interest rate				2.50%
Imputed option life				6 years 9 months 22 days
Expected dividend yield				6.60%
Compensation expense related to stock options				$ 94,000	$ 16,000
Unrecognized compensation cost				$ 361,000
Unrecognized compensation cost, recognition period				4 years
Aggregate intrinsic value of options expected to vest				$ 347,054
Aggregate intrinsic value of options exercisable				$ 70,947
Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to be issued under plan			920,000
Increase in number of shares authorized		300,000	920,000
Shares available for issuance				220,000
Plan term				10 years