Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2024

Stock-Based Compensation [Abstract]

Share-based Compensation Expense

The Company recorded share‑based compensation expense (for all awards and modifications, if any) in the accompanying condensed consolidated statements of operations as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2024		2023		2024			2023
Selling and marketing*	$	16	$	19	$	(8	)	$	118
General and administrative		10		318		309			896
	$	26	$	337	$	301		$	1,014

*Selling and marketing expense was negative during the nine months ended September 30, 2024 due to the forfeiture of awards during the period.

Stock Option Activity

The following table summarizes stock option activity for the nine months ended September 30, 2024:

	Number of Shares  Under Option Plan			Weighted-Average Exercise Price per  Option		Weighted-Average Remaining Contractual Term (in years)
Outstanding at January 1, 2024		772,864		$	11.07
Granted		50,000			3.24
Forfeited and expired		(321,138	)		14.07
Outstanding at September 30, 2024		501,726		$	8.36		8.1
Exercisable at September 30, 2024		158,362		$	14.47		5.8
Vested and expected to vest at September 30, 2024		501,726		$	8.36		8.1

Weighted Average Assumption Used for Grant Date Fair Value of Option Grants

For the nine months ended September 30, 2024, the grant date fair value of all option grants was estimated at the time of grant using the Black-Scholes option-pricing model using the following weighted average assumptions:

Expected volatility	77.7	%
Risk‑free rate	3.8	%
Expected term (in years)	6.50
Dividend rate	0.00	%

Summary of Activity in Restricted Stock Units

Restricted stock units have been issued to certain board members. Activity in restricted stock units is summarized in the following table:

	Number of Units			Weighted-Average  Grant Date Fair Value
Unvested at January 1, 2024		2,265		$	10.30
Vested		(2,265	)		10.30
Unvested at September 30, 2024		—		$	—