Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Oct. 31, 2013
Investment Measurement [Line Items]
Current trading securities (cost)	$ 194	$ 134
Noncurrent trading securities (cost)	3,026	2,375
Current trading securities (fair value)	308	199
Noncurrent trading securities (fair value)	3,642	2,995
Total trading securities (cost)	3,220	2,509
Total trading (fair value)	3,950	3,194
Money markets [Member]
Investment Measurement [Line Items]
Current trading securities (cost)	22	0
Noncurrent trading securities (cost)	452	380
Current trading securities (fair value)	22	0
Noncurrent trading securities (fair value)	452	380
Total trading (fair value)	474	380
Mutual funds [Member]
Investment Measurement [Line Items]
Current trading securities (cost)	172	134
Noncurrent trading securities (cost)	2,574	1,995
Current trading securities (fair value)	286	199
Noncurrent trading securities (fair value)	3,190	2,615
Total trading (fair value)	$ 3,476	$ 2,814