Cash dividend and declared dividends - Additional Information (Detail) (USD $)	3 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Dividends Payable [Line Items]
Dividends paid	$ 570,000	$ 700,000
Dividends Paid
Dividends Payable [Line Items]
Dividends paid, per share	$ 0.07	$ 0.10
Dividends paid	$ 570,000	$ 700,000