STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of stock option activity

The following table presents the outstanding stock option activity:

	Number of Options		Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term (years)
Three months ended March 31, 2024:
Outstanding as of December 31, 2023	36,708		$	119.70	4.0
Forfeited	(41)		300.62		3.0
Outstanding as of March 31, 2024	36,667	(1)	119.49		3.8

(1) Includes options related to 8,249 shares that are inducement awards and not granted under the 2018 Plan.

Schedule of stock-based compensation expense

The stock-based compensation expense was recorded as follows (in thousands):

	Three Months Ended March 31,
	2024		2023
Research and development	$	4	$	4
Selling, general and administrative (1)	81		162
Total stock-based compensation expense	$	85	$	166

(1) Includes $2,000 related to stock issued in exchange for marketing services for the three months ended March 31, 2023.