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Equity Incentive Plan (Tables)
9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions The assumptions used in the Black-Scholes model were as follows:
Three Months
Ended September 30,
Nine Months
Ended September 30,
2024202320242023
Expected volatility81.8%
124.3-126.1%
81.8-84.0%
Expected term (in years)0.53.50.5
Risk-free interest rate5.52%
4.09-4.61%
5.27-5.52%
Dividend yield
Share-based Payment Arrangement, Option, Activity
The following table summarizes option activity:
Shares
Subject to Options
Weighted-
Average
Exercise
Price
Weighted-
Average
Remaining
Contractual
Term (years)
Aggregate
Intrinsic
Value
(in thousands)
Options outstanding — January 1, 2024395,241 $6.34 
Granted371,465 $2.16 
Exercised— $— 
Forfeited(323,536)$3.21 
Options outstanding — September 30, 2024443,170 $5.11 4.5$— 
Vested and expected to vest — September 30, 2024443,170 $5.11 4.5$— 
Exercisable — September 30, 2024200,985 $7.59 3.8$— 
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity
The following table summarizes RSU activity:
 Number of
Shares
Weighted Average
Grant Date Fair Value
Outstanding — January 1, 202458,929 $9.51 
Granted1,757,250 $1.72 
Vested and released(741,184)$1.88 
Forfeited— $— 
Outstanding — September 30, 20241,074,995 $2.04 
Vested and unreleased — September 30, 2024199,219 $1.90 
Share-based Payment Arrangement, Expensed and Capitalized, Amount
The Company recorded the following compensation expense related to its share-based compensation awards (in thousands):
Three Months
Ended September 30,
Nine Months
Ended September 30,
2024202320242023
Sales and marketing$— $35 $— $86 
General and administrative511 721 2,369 1,874 
Total share-based compensation expense$511 $756 $2,369 $1,960 
Share-based Payment Arrangement, Nonvested Award, Cost
Total unrecognized estimated compensation cost by type of award and the weighted-average remaining requisite service period over which such expense is expected to be recognized (in thousands, unless otherwise noted):
September 30, 2024
Unrecognized ExpenseRemaining Weighted-Average Recognition Period (years)
RSUs$1,368 1.1
Stock options$160 0.5