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EARNINGS PER SHARE
9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
EARNINGS PER SHARE EARNINGS PER SHARE
Diluted net loss per share is the same as basic net loss per share for the three and nine months ended September 30, 2018 and 2019 because the effects of potentially dilutive items were anti-dilutive, given our net loss during these periods. The following securities as of September 30, 2018 and September 30, 2019 have been excluded from the calculation of diluted weighted-average common shares outstanding because the effect is anti-dilutive (in thousands):
 
September 30,
 
2018
 
2019
Common stock options
1,862

 
1,505

Common stock warrants
868

 
13

Unvested restricted stock units
1,200

 
1,737

Common stock issuable pursuant to the ESPP
151

 
49