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STOCK-BASED COMPENSATION PLANS (Tables)

9 Months Ended

Sep. 30, 2019

STOCK-BASED COMPENSATION PLANS

Fair Value of Stock Options Grants

The Company used the Black Scholes option pricing model to determine the fair value of stock option grants, using the following assumptions for the three and nine months ended September 30, 2019 and 2018.

		For the Three Months				For the Nine Months
		Ended September 30,				Ended September 30,
		2019		2018		2019		2018
Expected term (years)		6.25		6.25		6.25		6.25
Risk-free interest rate		1.83	%	2.78	%	2.34	%	2.78	%
Expected volatility		121.58	%	123.05	%	121.83	%	123.05	%
Expected dividend yield		—	%	—	%	—	%	—	%

Summary of Stock Option Activity Under the Option Plan

A summary of stock option activity under all equity compensation plans for the nine months ended September 30, 2019, is presented below:

							Weighted-
							Average
				Weighted-			Remaining		Aggregate
		Number of		Average			Contractual		Intrinsic
		Shares		Exercise			Term		Value
		(in thousands)		Price			(Years)		(in thousands)
Outstanding at December 31, 2018		1,885		$	0.80		6.3		$	4,085
Granted		616		$	5.62
Expired		(7)			1.00
Forfeited		(115)		$	2.47
Exercised		(253)		$	0.68
Outstanding at September 30, 2019		2,126		$	2.12		6.6		$	15,720
Exercisable at September 30, 2019		1,171		$	0.43		4.7		$	10,626

Restricted Stock Award Activity Under all Equity Compensation Plans

A summary of restricted stock award activity under all equity compensation plans for the nine months ended September 30, 2019, is presented below:

		Number of
		Shares
		(in thousands)
Granted but not vested at December 31, 2018		76
Granted		45
Forfeited		—
Vested		(21)
Granted but not vested at September 30, 2019		100

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Tabular disclosure of the changes in outstanding nonvested restricted stock shares.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, 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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