Note 10 - Operating Segments (Detail) - Revenues by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Revenue:
Revenues (in Dollars)	$ 77,414	$ 66,054	$ 136,198	$ 122,107
Percent Of Revenues	100.00%	100.00%	100.00%	100.00%
United States [Member]
Revenue:
Revenues (in Dollars)	31,921	28,771	61,133	54,955
Percent Of Revenues	41.20%	43.60%	44.90%	45.00%
Canada [Member]
Revenue:
Revenues (in Dollars)	1,826	2,226	3,579	3,744
Percent Of Revenues	2.40%	3.40%	2.60%	3.10%
Other Americas [Member]
Revenue:
Revenues (in Dollars)	1,405	1,125	2,833	2,178
Percent Of Revenues	1.80%	1.70%	2.10%	1.80%
Europe [Member]
Revenue:
Revenues (in Dollars)	3,826	2,440	6,298	4,027
Percent Of Revenues	4.90%	3.70%	4.60%	3.30%
Australia [Member]
Revenue:
Revenues (in Dollars)	26,949	25,293	42,162	43,987
Percent Of Revenues	34.80%	38.30%	31.00%	36.00%
Asia [Member]
Revenue:
Revenues (in Dollars)	11,172	6,016	19,562	12,665
Percent Of Revenues	14.40%	9.10%	14.40%	10.40%
Other Geographic Areas [Member]
Revenue:
Revenues (in Dollars)	$ 315	$ 183	$ 631	$ 551
Percent Of Revenues	0.50%	0.20%	0.40%	0.40%