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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
9 Months Ended
Sep. 30, 2013
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES  
Schedule of antidilutive shares excluded from computation of diluted net loss per share

 

 

September 30,
2012

 

September 30,
2013

 

Stock options

 

480,415

 

487,719

 

Restricted stock units

 

40,121

 

119,248

 

Convertible preferred stock

 

73,747

 

20,381

 

Contingently issuable common stock and common stock warrants associated with Economic Rights

 

435,187

 

 

Common stock warrants

 

1,973,431

 

1,591,795

 

Total shares excluded from calculation

 

3,002,901

 

2,219,143