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STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Summary of equity incentive program
A summary of our equity incentive program as of September 30, 2022 is as follows (in thousands):
Common stock shares available for grant1,873 
Stock options outstanding 143 
RSUs outstanding541 
RSAs outstanding119 
PSUs outstanding617 
Summary of time-based stock options
The following summarizes activities for the time-based stock options for the nine months ended September 30, 2022:
Number of Shares
Underlying Stock Options
(in thousands)		Weighted Average
Exercise Price
Per Share		Weighted Average
Remaining Contractual Life
(Years)		Aggregate
Intrinsic Value
(in thousands)
Outstanding at December 31, 2021242 $8.04 4.44$— 
Granted— — 
Exercised— — 
Canceled or expired(99)8.47 
Outstanding as of September 30, 2022143 $7.74 4.21$— 
Vested and expected to vest at September 30, 2022137 $7.74 4.21$— 
Exercisable at September 30, 202296 $7.77 4.17$— 
Summary of restricted stock units activities
The following summarizes RSU activities for the nine months ended September 30, 2022:
Number of Restricted Stock Units
 (in thousands)		Weighted Average Grant Date Fair Value Per Share
Weighted Average
Remaining Contractual Life
(Years)
Aggregate
Intrinsic Value
(in thousands)
Outstanding at December 31, 2021224 $6.66 0.56$1,280 
Granted600 4.78 
Released(221)5.90 
Forfeited(62)5.90 
Outstanding at September 30, 2022541 $4.95 2.11$2,972 
Summary of restricted stock awards activities
The following summarizes RSA activities for the nine months ended September 30, 2022:
Number of Restricted Stock Awards
(in thousands)
Weighted Average Grant Date Fair Value Per ShareWeighted Average Remaining Recognition Period
(Years)
Outstanding at December 31, 2021— $— 0.00
Granted233 5.13 
Released(114)4.78 
Forfeited— — 
Outstanding at September 30, 2022119 $5.47 0.64
Share-based Payment Arrangement, Outstanding Award, Activity, Excluding Option
The following summarizes PSU activities for the nine months ended September 30, 2022:
Number of Market Condition-Based Restricted Stock Units
(in thousands)		Weighted Average Grant Date Fair Value Per ShareWeighted Average Remaining Recognition Period
(Years)
Outstanding at December 31, 202167 $6.20 1.49
Granted600 3.63 
Released(9)6.20 
Forfeited(41)6.20 
Outstanding at September 30, 2022617 $3.70 1.24

The assumptions used to value market condition-based restricted stock units granted during the nine months ended September 30, 2022 under our equity incentive program are as follows:
Nine Months Ended
September 30, 2022
Expected life (in years)1.2
Volatility58%
Interest rate1.7%
Dividend yield—
Summary of stock-based compensation expenses The stock-based compensation related to all of our stock-based awards and ESPP for the three and nine months ended September 30, 2022 and 2021 is as follows (in thousands):
 Three Months Ended
September 30,		Nine Months Ended
September 30,
 2022202120222021
Stock options$53 $123 $67 $317 
RSUs, RSAs and PSUs678 286 2,593 1,635 
ESPP(1)6 1 45 
Total$730 $415 $2,661 $1,997 
Sales and marketing$19 $141 $20 $678 
Research and development18 118 96 653 
General and administrative693 156 2,545 666 
Total$730 $415 $2,661 $1,997