Net Loss per Share Attributable to Alexza Common Stockholders

6 Months Ended

Jun. 30, 2011

Net Loss per Share Attributable to Alexza Common Stockholders [Abstract]

Net Loss per Share Attributable to Alexza Common Stockholders

6. Net Loss per Share Attributable to Alexza Common Stockholders

Historical basic and diluted net loss per share attributable to Alexza common stockholders is calculated by dividing the net loss attributable to Alexza common stockholders by the weighted-average number of common shares outstanding for the period. The following items were excluded in the net loss per share attributable to Alexza common stockholders calculation for the three and six months ended June 30, 2011 and 2010 because the inclusion of such items would have had an anti-dilutive effect:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
Stock options		3,091,688		4,488,500		3,567,344		4,572,499
Restricted stock units		1,416,629		1,403,147		1,411,732		1,000,854
Warrants to purchase common stock		18,533,758		12,915,751		17,838,014		12,853,019