Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2024

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Summary of Stock Option Activities

The following table summarizes stock option activities for the years ended December 31, 2024 and 2023:

				Weighted Average
				Remaining
		Weighted Average		Contractual Life (in
	Stock Options	Exercise Price		years)
Outstanding at December 31, 2023	1,521	$	4,297.50	3.31
Outstanding at December 31, 2024	1,521	$	4,297.50	2.31
Options vested and exercisable at December 31, 2024	951	$	4,297.50	2.31

Schedule of Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense for the years ended December 31, 2024 and 2023 (in thousands).

	For the year ended December 31,
	2024		2023
General and administrative	$	200	$	436
Research and development		(650)		132
Total stock-based compensation expense	$	(450)	$	568

Summary of Warrant Activities

A summary of warrant activities for the years ended December 31, 2024 and 2023, is presented below:

				Weighted Average
				Remaining
		Weighted Average		Contractual Life (in
	Warrants	Exercise Price		years)
Outstanding as of December 31, 2022	1,387	$	1,152.94	8.29
Expired	(1)		0.08	—
Granted	88,232		50.09	5.29
Outstanding as of December 31, 2023	89,618	$	67.16	5.34
Exercised	(747,368)		5.35	—
Granted	2,234,669		10.93	2.10
Outstanding as of December 31, 2024	1,576,919	$	14.56	3.14

Schedule of key inputs used for the Black-Scholes Model calculation to measure the fair value the New Warrants

The key inputs used for the Black-Scholes Model calculation on October 25, 2024, to measure the fair value of the New Warrants, were as follows:

	New Series B-1		New Series B-2
	Warrants		Warrants
Stock Price	14.50		14.50
Risk-free interest rate	4.1	%	4.3	%
Expected dividend yield	—		—
Expected term in years	5		1
Expected volatility	122.2	%	213.2	%

Restricted stock award

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Schedules of Restricted Stock and Restricted Stock Unit Activity

Certain employees and directors have been awarded restricted stock. The restricted stock vesting consists of milestone and time-based vesting. The following table summarizes restricted stock award activities for the years ended December 31, 2024 and 2023:

		Weighted Average
		Grant Date Fair
	Number of Shares	Value
Nonvested at December 31, 2022	675	$	1,107.83
Granted	720		345.00
Vested	(110)		2,310.00
Nonvested at December 31, 2023	1,285	$	577.50
Vested	(90)		2,722.50
Nonvested at December 31, 2024	1,195	$	415.95

Restricted stock units

Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]

Schedules of Restricted Stock and Restricted Stock Unit Activity

The following table summarizes restricted stock units’ activities for the year ended December 31, 2024 and 2023:

		Weighted Average
		Grant Date Fair
	Number of Units	Value
Nonvested at December 31, 2022	3,303	$	1,391.48
Granted	577		256.51
Forfeited	(1,027)		1,374.25
Vested	(942)		1,614.25
Nonvested at December 31, 2023	1,911	$	948.25
Forfeited	(1,320)		911.70
Vested	(365)		1,205.20
Nonvested at December 31, 2024	226	$	746.70