Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Stock-Based Compensation

Schedule of share-based compensation expense

Stock-based compensation expense was included in general and administrative and research and development costs as follows in the accompanying condensed consolidated statements of operations and comprehensive loss:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
		2023		2022		2023		2022
General and administrative	$	24	$	211	$	(61)	$	418
Research and development		-		-		11		-
Total stock-based compensation	$	24	$	211	$	(50)	$	418

Schedule of stock option plan activity

The following table summarizes the Company’s activity related to its stock options for the six months ended June 30, 2023:

				Weighted‑
		Weighted		Average	Aggregate
		Average		Remaining	Intrinsic
	Number of	Exercise		Contractual	Value
	Options	Price		Term (years)	(in thousands)
Outstanding at December 31, 2022	36,493	$	99.62	8.5	$	—
Granted	25,000	$	0.67	—	$	—
Exercised	-	$	—	—	$	—
Forfeited/Cancelled	(21,221)	$	59.72	—	$	—
Outstanding at June 30, 2023	40,272	$	59.21	8.9	$	-
Vested and expected to vest at June 30, 2023	40,272	$	59.21	8.9	$	-
Options exercisable at June 30, 2023	38,734	$	58.09	8.9	$	-

Schedule of assumptions used in the Black Scholes option-pricing model

	Six Months Ended
	June 30,
	2023			2022
Expected stock price volatility		82.9	%		80.7-85.2	%
Expected life of options (years)		5.0			5.5-5.8
Expected dividend yield		—	%		—	%
Risk free interest rate		3.54	%		1.72-3.08	%