SHARE-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Share-Based Compensation Expense

The following table sets forth the amount of share-based compensation expense recognized by the Company by line item on its Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2022 and 2021 (in thousands):

	Three Months Ended June 30,				Six Months Ended  June 30,
	2022		2021		2022		2021
Research and development	$	473	$	207	$	975	$	386
General and administrative	1,329		1,052		2,721		1,831
Total Share Based Compensation	$	1,802	$	1,259	$	3,696	$	2,217

Schedule of Stock Option Activity

The following table sets forth a summary of the Company’s total stock option activity, including awards granted under the 2014 Plan and the 2009 Plan and inducement grants made outside of stockholder approved plans, for the six months ended June 30, 2022:

	Number of Shares under Option (in thousands)	Weighted-Average Exercise Price	Weighted-Average Remaining Contractual  Life (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2021	15,703	$1.93	8.03	$	82
Granted	1,511	$0.72
Exercised	—	—
Canceled or forfeited	(53)	1.20
Outstanding at June 30, 2022	17,161	$1.83	7.72	$	218
Exercisable at June 30, 2022	9,555	$1.72	7.11	$	64

Schedule of Weighted-Average Inputs and Assumptions in Black-Scholes Option

For the six months ended June 30, 2022 and 2021, the grant-date fair value of stock options was determined using the following weighted-average inputs and assumptions in the Black-Scholes option pricing model:

	June 30, 2022	June 30, 2021
Fair market value	$0.72	$3.34
Grant exercise price	$0.72	$3.34
Expected term (in years)	6.0	6.04
Risk-free interest rate	2.1%	0.9%
Expected volatility	71.8%	74.7%
Dividend yield	—%	—%

Schedule of the Status of Restricted Stock Units

The following table sets forth a summary of the Company's RSU and PSU activity for the six months ended June 30, 2022:

	Restricted Stock Units (in thousands)	Weighted Average Grant Date Fair Value
Unvested at December 31, 2021	3,041	$0.80
Granted RSU	4,161	$0.68
Cancelled RSU	(143)	$0.75
Granted PSU	1,004	$0.67
Unvested at June 30, 2022	8,063	$0.72