Note 12. Loss Per Share

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


	Three Months Ended						Nine Months Ended
	July 31,						July 31,
	2011			2010			2011			2010
Numerator
Net loss	$	(7,830	)	$	(13,114	)	$	(38,845	)	$	(43,810	)
Net loss attributable to noncontrolling interest		76			88			197			270
Adjustment for modification of redeemable preferred stock of subsidiary		—			—			(8,987	)		—
Preferred stock dividend		(800	)		(799	)		(2,400	)		(2,401	)

Net loss to common shareholders	$	(8,554	)	$	(13,825	)	$	(50,035	)	$	(45,941	)


Denominator
Weighted average basic common shares		126,923,550			93,512,868			122,306,465			87,510,734
Effect of dilutive securities⁽¹⁾		—			—			—			—

Weighted average diluted common shares		126,923,550			93,512,868			122,306,465			87,510,734

Basic loss per share	$	(0.07	)	$	(0.15	)	$	(0.41	)	$	(0.52	)

Diluted loss per share⁽¹⁾	$	(0.07	)	$	(0.15	)	$	(0.41	)	$	(0.52	)


(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, warrants and convertible preferred stock. At July 31, 2011 and 2010, there were options to purchase 3.9 million and 5.2 million shares of common stock, respectively. There were outstanding warrants of 10.2 million as of July 31, 2011 and there were no warrants outstanding as of July 31, 2010. Refer to our Annual Report on Form 10-K for the year ended October 31, 2010 for information on our convertible preferred stock.