Benefit Plans Employee stock purchase plan (Tables)

12 Months Ended

Oct. 31, 2016

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, 2016 was as follows:

	Number of
ESPP	Shares
Balance at October 31, 2015	88,043
Issued at $9.02 per share	(11,664	)
Issued at $5.07 per share	(14,153	)
Available for issuance at October 31, 2016	62,226

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:

	2016		2015		2014
Expected life (in years)	0.5		0.5		0.5
Risk free interest rate	0.30	%	0.07	%	0.08	%
Volatility	37.0	%	72.0	%	75.0	%
Dividends yield	—	%	—	%	—	%