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STOCKHOLDERS’ EQUITY (Tables)
 12 Months Ended
Dec. 31, 2022
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 2022 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, 2022
Valuation assumptions: 
Grant price
$1.71 – $2.46
Exercise price
$1.71 – $3.69
Expected dividend yield0 %
Expected volatility
84.59% – 86.92%
Expected life (in years)
2.94 – 3.75
Risk-free interest rate
2.76% – 3.07%
The fair value of the Company’s stock options granted in the years ended, December 31, 2018 and 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, 2022
Valuation assumptions:
Exercise price range
$2.68 – $2.87
Expected dividend yield0 %
Expected volatility range for grants after mark-to-market adjustment
82.03% - 82.87%
Expected life (in years) for grants after mark-to-market adjustment
0.04 – 0.96
Risk-free interest rate range for grants after mark-to-market adjustment
0.52% - 4.74%
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 PriceWeighted- average Remaining
Contractual Term		Aggregate Intrinsic Value
Outstanding at December 31, 2020637,882$2.50 2.55 years$5,686 
Granted221,84310.38  
Forfeited(3,000)2.79 
Exercised(360,301)2.34  
Outstanding at December 31, 2021496,424$6.13 3.03 years$528 
Granted732,2282.14 
Forfeited(108,408)4.53 
Exercised—— 
Outstanding at December 31, 20221,120,244$3.68 3.50 years$84 
Exercisable at December 31, 2022366,460$5.35 1.78 years$84 
Summary of Stock Options
The following is a summary of stock options as of December 31, 2022:
Options OutstandingOptions Exercisable
Range of Exercise PricesNumber of
Options		Weighted-
average
Remaining Life		Weighted-
average
Exercise
Price		Number of
Options		Weighted-
average
Exercise
Price
$1.71 to $3.69
931,8094.21 years$2.29 244,581$2.70 
$8.56 to $11.50
188,4353.20 years$10.56 121,879$10.66 
1,120,2443.50 years$3.68 366,460$5.35 
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, 20201,754$11.40 
Granted443,44210.30 
Forfeited(4,650)11.50 
Vested and Settled in shares(32,170)8.47 
Outstanding at December 31, 2021408,376$10.43 
Granted139,9582.23 
Forfeited(36,445)10.35 
Vested and Settled in shares(296,997)8.03 
Outstanding December 31, 2022214,892$8.43 
Schedule of Performance Stock Unit Activity
Number of
Shares 		Weighted
Average
Grant Date
Fair Value
Outstanding at December 31, 2020265,942$7.91 
Forfeited(37,444)7.91 
Outstanding at December 31, 2021228,498$7.91 
Forfeited(50,810)7.91 
Outstanding at December 31, 2022177,688$7.91 
Schedule of Stock-based Compensation Expense
Stock-based compensation expense for the years ended December 31, 2022 and 2021 is as follows:
Years Ended December 31,
20222021
Stock options$382 $4,143 
Restricted stock units1,342 1,956 
Performance stock units731 301 
$2,455 $6,400 
Schedule of Stock-based Compensation Included in Operating Expenses
Stock-based compensation is included in operating expenses as follows:
Years Ended December 31,
20222021
Selling, general and administrative$1,789 $5,782 
Research and development666 618 
$2,455 $6,400