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Benefit Plans Employee stock purchase plan (Tables)

12 Months Ended

Oct. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block]

ESPP activity for the year ended October 31, 2015 was as follows:

	Number of
ESPP	Shares
Balance at October 31, 2014	23,517
Issued at $20.64 per share	(8,182	)
Issued at $12.60 per share	(10,627	)
Available for issuance at October 31, 2015	4,708

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

The fair value of shares under the ESPP was determined at the grant date using the Black-Scholes option-pricing model with the following weighted average assumptions:

		2015			2014			2013
Expected life (in years)		0.5			0.5			0.5
Risk free interest rate		0.07	%		0.08	%		0.15	%
Volatility		72.0	%		75.0	%		75.0	%
Dividends yield		—	%		—	%		—	%

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- References

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- Definition

Tabular disclosure of employee stock purchase plan activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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