NET LOSS PER COMMON SHARE (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Schedule Of Anti-Dilutive Common Stock Excluded From Computation of Diluted Net Loss Per Share

The table below presents potential shares of common stock that were excluded from the computation as they were anti-dilutive using the treasury stock method (in thousands):

	Years Ended December 31,
	2015		2014		2013
Options to purchase common stock		10,323		11,477		13,157
Common stock issuable under the 2017 Notes		1,544		1,992		3,047
Common stock issuable under the 2018 and 2020 Notes		7,966		7,966		7,966
Unvested restricted stock units		1,743		1,244		1,159
Potentially issuable common stock for the ESPP purchases		180		195		197
Common stock held by the NQDC		243		224		193
Total number of potentially issuable shares		21,999		23,098		25,719