STOCKHOLDERS’ EQUITY (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Schedule of Stock Option Valuation Assumptions for Equity Awards and Liability Awards

The fair value of the Company’s stock options granted in 2023 that are being classified as equity awards were estimated using the Black-Scholes option pricing model with the following assumptions and weighted average fair values:

	Year Ended December 31, 2023
Valuation assumptions:
Grant price	$2.44 – $3.78
Exercise price	$2.44 – $3.78
Expected dividend yield	0	%
Expected volatility	73.77% – 86.24%
Expected life (in years)	2.50 – 3.75
Risk-free interest rate	4.19% – 4.65%

The fair value of the Company’s stock options granted in the year ended December 31, 2019, that are being classified as liability awards were marked-to-market using the Black-Scholes option pricing model with the following assumptions and weighted average fair values:

	Year Ended December 31, 2023
Valuation assumptions:
Exercise price	$2.68
Expected dividend yield	0	%
Expected volatility range for grants after mark-to-market adjustment	79.88% - 82.02%
Expected life (in years) for grants after mark-to-market adjustment	0.08 – 0.54
Risk-free interest rate range for grants after mark-to-market adjustment	4.80% - 5.59%

Schedule of Stock Option Activity

Stock option activity during the periods indicated below was as follows:

	Number of Shares Subject to Issuance	Weighted- average Exercise Price		Weighted- average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 31, 2021	496,424	$	6.13	3.03 years	$	528
Granted	732,228	2.14
Forfeited	(108,408)	4.53
Outstanding at December 31, 2022	1,120,244	$	3.68	3.50 years	$	84
Granted	627,507	2.91
Forfeited	(595,037)	4.05
Exercised	—	—
Outstanding at December 31, 2023	1,152,714	$	3.07	3.18 years	$	38
Exercisable at December 31, 2023	550,964	$	3.47	2.33 years	$	23

Summary of Stock Options

The following is a summary of stock options as of December 31, 2023:

	Options Outstanding				Options Exercisable
Range of Exercise Prices	Number of Options	Weighted- average Remaining Life	Weighted- average Exercise Price		Number of Options	Weighted- average Exercise Price
$1.71 to $3.69	1,024,398	3.95 years	$	2.47	484,081	$	2.35
$3.78 to $11.50	128,316	2.85 years	$	8.00	66,883	$	11.50
	1,152,714	3.18 years	$	3.07	550,964	$	3.47

Schedule of Restricted Stock Unit Activity

Restricted stock unit activity during the periods indicated below is as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2021	408,376	$	10.43
Granted	139,958	2.23
Forfeited	(36,445)	10.35
Vested and Settled in shares	(296,997)	8.03
Outstanding at December 31, 2022	214,892	$	8.43
Granted	249,412	2.34
Forfeited	(70,959)	10.04
Vested and Settled in shares	(332,845)	4.29
Outstanding December 31, 2023	60,500	$	4.23

Schedule of Performance Stock Unit Activity

	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2021	228,498	$	7.91
Forfeited	(50,810)	7.91
Outstanding at December 31, 2022	177,688	$	7.91
Forfeited	(88,844)	7.91
Vested and settled in shares	(88,844)	7.91
Outstanding at December 31, 2023	—	$	—

Schedule of Stock-based Compensation Expense

Stock-based compensation expense for the years ended December 31, 2023 and 2022 is as follows:

	Years Ended December 31,
	2023		2022
Stock options	$	666	$	382
Restricted stock units	930		1,342
Performance stock units	—		731
	$	1,596	$	2,455

Schedule of Stock-based Compensation Included in Operating Expenses

Stock-based compensation is included in operating expenses as follows:

	Years Ended December 31,
	2023		2022
Selling, general and administrative	$	1,358	$	1,789
Research and development	238		666
	$	1,596	$	2,455