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STOCK-BASED COMPENSATION (Tables)
 6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option and RSU Activity
The following table summarizes stock option and RSU activity, prices, and values for the six months ended June 30, 2024:
Number of
Shares
Available
for
Issuance
Under the
Plan
Stock OptionsRestricted Stock Units
(in thousands except share price and fair value amounts)
Number of
Shares
Weighted-
Average
Exercise
Price
Number of
Shares
Weighted-
Average
Grant
Date
Fair Value
Balance at December 31, 20234,76232$5.79 2,058$2.57 
Granted(4,024)—— 4,0241.15 
RSUs vested72—— (551)1.63 
Forfeited or expired177(3)11.60 (174)1.59 
Balance at June 30, 202498729$5.50 5,357$1.47 
Schedule of Assumptions Used to Value Options Granted
For the three and six months ended June 30, 2024, and 2023, stock-based compensation expense was as follows:
(in thousands)
Three Months Ended
June 30,		Six Months Ended
June 30,
2024202320242023
Stock-based compensation — Options$1 $771 $6 $1,548 
Stock-based compensation — RSUs$1,324 $651 $2,008 $1,141 
Total stock-based compensation
$1,325 $1,422 $2,014 $2,689