Note 10 - Operating Segments (Detail) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Revenue:
Revenue (in Dollars)	$ 63,386	$ 58,327	$ 185,493	$ 162,025
Percent Of Revenue	100.00%	100.00%	100.00%	100.00%
United States [Member]
Revenue:
Revenue (in Dollars)	28,372	26,578	83,327	76,928
Percent Of Revenue	44.80%	45.60%	44.90%	47.50%
Canada [Member]
Revenue:
Revenue (in Dollars)	2,422	2,696	6,166	5,970
Percent Of Revenue	3.80%	4.60%	3.30%	3.70%
Other North America [Member]
Revenue:
Revenue (in Dollars)	1,046	1,308	3,224	3,668
Percent Of Revenue	1.60%	2.20%	1.80%	2.30%
Europe [Member]
Revenue:
Revenue (in Dollars)	2,085	2,344	6,112	5,986
Percent Of Revenue	3.30%	4.00%	3.30%	3.70%
Australia [Member]
Revenue:
Revenue (in Dollars)	20,785	20,395	64,772	55,909
Percent Of Revenue	32.80%	35.00%	34.90%	34.50%
Asia [Member]
Revenue:
Revenue (in Dollars)	8,240	4,189	20,905	11,965
Percent Of Revenue	13.00%	7.20%	11.30%	7.40%
Other Geographic Areas [Member]
Revenue:
Revenue (in Dollars)	$ 436	$ 817	$ 987	$ 1,599
Percent Of Revenue	0.70%	1.40%	0.50%	0.90%