SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2018

Schedule of estimated useful lives of assets

Depreciation of property and equipment is calculated using the straight-line method over the estimated useful lives of the assets, as follows:



Computer equipment		3 years
Office and other equipment		6 years
Laboratory equipment		6 years
Leasehold improvements		The lesser of the lease term or the life of the asset

Schedule of potentially dilutive securities not included in the calculation of diluted net loss per share because to do so would be anti-dilutive

The following table presents the weighted average number of potentially dilutive securities not included in the calculation of diluted net loss per share due to the anti-dilutive effect of the securities:



	Year ended
	December 31,
	2018	2017	2016
Common stock options	1,781,388	38,675	173,776
Common stock warrants	11,631,636	7,534,576	315,834
Total	13,413,024	7,573,251	489,610