Note 12. Loss Per Share

The calculation of basic and diluted loss per share was as follows:

	Three Months Ended April 30,						Six Months Ended April 30,
	2018			2017			2018			2017
Numerator
Net loss	$	(13,174	)	$	(13,238	)	$	(17,357	)	$	(26,923	)
Series C preferred stock deemed dividends		(4,199	)		—			(7,662	)		—
Series B preferred stock dividends		(800	)		(800	)		(1,600	)		(1,600	)
Net loss attributable to common stockholders	$	(18,173	)	$	(14,038	)	$	(26,619	)	$	(28,523	)
Denominator
Weighted average basic common shares		79,563,265			42,568,818			75,731,565			40,049,948
Effect of dilutive securities ⁽¹⁾		—			—			—			—
Weighted average diluted common shares		79,563,265			42,568,818			75,731,565			40,049,948
Basic loss per share	$	(0.23	)	$	(0.33	)	$	(0.35	)	$	(0.71	)
Diluted loss per share ⁽¹⁾	$	(0.23	)	$	(0.33	)	$	(0.35	)	$	(0.71	)

(1)

Due to the net loss to common stockholders in each of the periods presented above, diluted loss per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. As of April 30, 2018 and 2017, potentially dilutive securities excluded from the diluted loss per share calculation are as follows:

	April 30,		April 30,
	2018		2017
May 2017 Offering - Series C Warrants		11,569,364		—
July 2016 Offering - Series A Warrants		7,680,000		7,680,000
July 2014 Offering - NRG Warrant		—		166,666
Outstanding options to purchase common stock		327,890		214,383
Unvested Restricted Stock Awards		1,185,457		1,986,732
Series C Preferred Shares to satisfy conversion requirements ⁽¹⁾		7,906,783		—
5% Series B Cumulative Convertible Preferred Stock		454,043		454,043
Series 1 Preferred Shares to satisfy conversion requirements		15,166		15,166
Total potentially dilutive securities		29,138,703		10,516,990

(1)

The number of shares of common stock issuable upon conversion of the Series C Preferred Stock was calculated using the stated value outstanding on April 30, 2018 of $14.5 million (original stated value of $33.5 million less the stated value of conversions to date through April 30, 2018 totaling $19.0 million) divided by the conversion price of $1.84. The actual number of shares issued could vary depending on the actual market price of the Company’s common shares on the date of such conversions.