Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Stock-based Compensation

Schedule of stock-based compensation expense

	Three Months Ended
	March 31,
	2024		2023
Sales and marketing	$	11	$	30
General and administrative		36		128
Research and development		25		64
Total stock-based compensation expense	$	72	$	222

Summary of stock option activity

				Weighted
		Weighted		Average	Aggregate
		Average		Remaining	Intrinsic
		Exercise Price		Contractual	Value
	Shares	Per Share		Life (years)	(in thousands)
Outstanding at December 31, 2023	15,218	$	377.75		$	—
Options granted	—		—
Options exercised	—		—
Options cancelled	(3,569)		144.80
Outstanding at March 31, 2024	11,649	$	449.12	5.6	$	—
Exercisable at March 31, 2024	10,448	$	493.96	5.3	$	—
Vested and expected to vest at March 31, 2024	11,649	$	449.12	5.6	$	—

Summary of unvested RSUs award activity

		Weighted
		Average
		Grant Date
	Shares	Fair Value
Unvested RSUs at December 31, 2023	1,417	$	129.38
Granted	—		—
Vested (1)	(442)	$	164.88
Cancelled/Forfeited	—		—
Non-vested RSUs at March 31, 2024	975	$	112.81

(1) At March 31, 2024, there were 108 shares of common stock related to RSU awards that had vested and the shares were not distributed to the participants.