Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of stock option activity

The following table summarizes stock option activity for the six months ended months ended June 30, 2023:

	Options Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at January 1, 2023	268,323	$	146.35	7.8	$	—
Granted	2,800	4.75
Expired	(14,930)	149.28
Forfeited	(12,838)	35.55
Outstanding at June 30, 2023	243,355	150.21		6.94	—
Vested as of June 30, 2023	172,673	178.73		6.08	—
Expected to vest as of June 30, 2023	70,682	80.54		9.06	—

Schedule of assumptions used to estimate the fair values of share options granted

For the options with service conditions, the assumptions used to estimate the fair values of the stock options granted in the six months ended June 30, 2023 and 2022 as follows:

	Six Months Ended
	June 30, 2023		June 30, 2022
Expected term (in years)	5.38		5.51-5.53
Expected volatility	128%		123%-124%
Expected dividend yield	—	%	—	%
Risk free interest rate	3.91%		1.69%-2.87%

Schedule of warrants outstanding and exercisable

	June 30, 2023	December 31, 2022
Warrants Outstanding	Number of Warrants Outstanding and Exercisable	Number of Warrants Outstanding and Exercisable	Exercise Price		Expiration Date
Acuitas	—	40,000	$	36.25	November 14, 2027
Acuitas	—	40,000	$	36.25	November 27, 2027
Total	—	80,000