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Loss Per Share (Tables)
 9 Months Ended
Jul. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
As of July 31, 2016 and 2015, potentially dilutive securities excluded from the diluted loss per share calculation are as follows:

 
July 31, 2016
 
July 31, 2015
July 2016 Offering - Series A Warrants
7,680,000

 
—

July 2016 Offering - Series B Warrants
4,926,000

 
—

July 2014 Offering - NRG Warrants
166,666

 
166,666

Outstanding options to purchase common stock
247,776

 
254,124

     Total potentially dilutive securities
13,020,442

 
420,790
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The calculation of basic and diluted loss per share was as follows:
 
Three Months Ended July 31,
 
Nine Months Ended July 31,
 
2016
 
2015
 
2016
 
2015
Numerator
 
 
 
 
 
 
 
Net loss
$
(11,067
)
 
$
(6,628
)
 
$
(38,260
)
 
$
(20,779
)
Net loss attributable to noncontrolling interest
57

 
89

 
165

 
280

Preferred stock dividend
(800
)
 
(800
)
 
(2,400
)
 
(2,400
)
Net loss attributable to common shareholders
$
(11,810
)
 
$
(7,339
)
 
$
(40,495
)
 
$
(22,899
)
Denominator
 
 
 
 
 
 
 
Weighted average basic common shares
31,015,658

 
24,884,103

 
28,680,596

 
24,312,330

Effect of dilutive securities (1)
—

 
—

 
—

 
—

Weighted average diluted common shares
31,015,658

 
24,884,103

 
28,680,596

 
24,312,330

Basic loss per share
$
(0.38
)
 
$
(0.29
)
 
$
(1.41
)
 
$
(0.94
)
              Diluted loss per share (1)
$
(0.38
)
 
$
(0.29
)
 
$
(1.41
)
 
$
(0.94
)
 
(1)
Diluted loss per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. Potentially dilutive instruments include stock options, unvested restricted stock awards, convertible preferred stock and warrants. As of July 31, 2016 and 2015, potentially dilutive securities excluded from the diluted loss per share calculation are as follows:

 
July 31, 2016
 
July 31, 2015
July 2016 Offering - Series A Warrants
7,680,000

 
—

July 2016 Offering - Series B Warrants
4,926,000

 
—

July 2014 Offering - NRG Warrants
166,666

 
166,666

Outstanding options to purchase common stock
247,776

 
254,124

     Total potentially dilutive securities
13,020,442

 
420,790