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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Restricted Stock Unit Activity
A summary of our restricted stock unit activity is set forth below:

SharesWeighted Average Grant Date Fair Value
Outstanding as of December 31, 202259,215 $77.87 
Granted208,960 $25.04 
Released(119,995)$44.83 
Forfeited(51,372)$39.40 
Outstanding as of December 31, 202396,808 $25.21 
Schedule of Stock Options Activity
A summary of our stock option activity under the 2018 Plan and related information is as follows:
Number of SharesWeighted Average
Exercise Price
Weighted Average
Remaining
Contractual Term
(years)
Aggregate Intrinsic
Value
Outstanding as of December 31, 20221,750 $71.73 5.60$— 
Granted1,500 38.15 
Exercised— — 
Forfeited(750)54.00 
Outstanding as of December 31, 20232,500 $56.89 4.19$— 
Exercisable as of December 31, 20232,500 $56.89 4.19$— 
A summary of our stock option activity under the 2009 Plan and related information is set forth below:

Number of SharesWeighted Average Exercise Price
Weighted Average Remaining
Contractual Term (years)
Aggregate Intrinsic Value
Outstanding as of December 31, 202217,495 $40.22 4.22$130 
Granted— — 
Exercised(1,895)30.36 
Cancelled/Expired(975)67.56 
Outstanding as of December 31, 202314,625 $39.67 2.94$— 
Exercisable as of December 31, 202314,625 $39.67 2.94$— 
Schedule of Stock-Based Compensation
Compensation cost that has been included in our consolidated statements of operations and comprehensive loss for all stock-based compensation arrangements is set forth below:
Year Ended December 31,
Stock-based compensation20232022
Cost of revenues$447 $210 
Sales and marketing135 104 
General and administrative3,294 2,542 
Research and development195 153 
Total stock-based compensation$4,071 $3,009