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STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2020

STOCK-BASED COMPENSATION

Summary of the Company's stock option activity

										Weighted
										Average
				Weighted						Remaining
		Number of		Average			Total Intrinsic			Contractual
		Shares		Exercise Price			Value			Life (in years)
Outstanding as of January 1, 2020		4,983,000		$	7.79		$	18,000		8.9
Granted		1,321,000			2.14			—		9.9
Cancelled		(13,000)			7.26			—		—
Outstanding as of March 31, 2020		6,291,000		$	6.60		$	—		8.9
Options vested and exercisable		1,610,000		$	8.17		$	—		8.4

Schedule or Description of Weighted Average Discount Rate

		For the Three Months Ended
		March 31, 2020
Exercise price		$	2.14
Expected term (years)			6.0
Expected stock price volatility			109	%
Risk-free rate of interest			1	%
Expected dividend rate			0	%

Schedule of stock-based compensation expenses

		For the Three Months Ended
		March 31,
		2020			2019
Stock Compensation expenses:
Research and development		$	781,000		$	687,000
General and administrative			564,000			839,000
Total stock compensation expenses		$	1,345,000		$	1,526,000

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Tabular disclosure of stock based compensation expenses recorded.

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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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