Annual report pursuant to Section 13 and 15(d)

SIGNIFICANT CONCENTRATIONS

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SIGNIFICANT CONCENTRATIONS
12 Months Ended
Dec. 31, 2016
SIGNIFICANT CONCENTRATIONS  
SIGNIFICANT CONCENTRATIONS

3. SIGNIFICANT CONCENTRATIONS

For the year ended December 31, 2016, BMS and BerGenBio accounted for 82% and 18% of our revenues, respectively. For the year ended December 31, 2015, BMS, Aclaris and another third party accounted for 60%,  28% and 12% of our revenues, respectively.  For the year ended December 31, 2014, AZ accounted for all of our revenues. As of December 31, 2015, we had accounts receivable from BMS of $203,000 relating to the performance of research activities.  As of December 31, 2016, we had no accounts receivable.