NET LOSS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2012

Diluted earnings per share is the same as basic earnings per share for the periods presented because the inclusion of outstanding common stock equivalents would be anti-dilutive. The following number of weighted shares outstanding, prior to the application of the treasury stock method, were excluded from the computation of diluted net loss per common share for the years presented because including them would have had an anti-dilutive effect (in thousands):

	Year Ended December 31,
	2012		2011		2010
Options to purchase common stock		3,746		3,667		3,187
Restricted stock units		97		61		48
Employee stock purchase plan shares		78		70		66
Performance stock units		8		—		—
Total		3,929		3,798		3,301