Acquisitions (Details) (USD $)	12 Months Ended	3 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Jan. 31, 2012	Dec. 20, 2012
Business Acquisition [Line Items]
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value				$ 10,200,000
Stock Issued During Period, Shares, Acquisitions	3,526,764
Pre-acquisition value				6,200,000
Versa [Member]
Business Acquisition [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage				39.00%
Business Acquisition, Percentage of Voting Interests Acquired				61.00%
Business combination, step acquisition, equity interest in acquiree, remeasurement loss		3,600,000
Cash and cash equivalents				357,000
Accounts receivable				1,133,000
Other current assets				23,000
Property, plant and equipment				480,000
Goodwill				4,075,000
In-process research and development				9,592,000
Other assets				101,000
Accounts payable				302,000
Other current liabilities				1,492,000
Deferred tax liabilities (1)				3,377,000	[1]
Other long-term liabilities				155,000
Total identifiable net assets				10,435,000
Versa [Member] | Selling and Administrative Expenses [Member]
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs				$ 100,000
Versa Acquisition [Member]
Business Acquisition [Line Items]
Stock Issued During Period, Shares, Acquisitions			3,500,000

[1] Classified in Long-term debt and other liabilities on the consolidated balance sheets.