Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Stock-Based Compensation [Abstract]

Schedule of restricted stock unit

	Restricted Stock Units			Weighted Average Grant Date Fair Value
Non-vested as of December 31, 2022		196,838		$	12.49
Granted		165,100			3.02
Forfeited		(3,933	)		4.73
Vested		(62,653	)		15.97
Non-vested as of June 30, 2023		295,352		$	6.56

Schedule of stock option activities

	Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (years)		Aggregate Intrinsic Value
Outstanding as of December 31, 2022		1,828,329		$	14.23		8.16	$	-
Granted		1,267,900			3.04		-		-
Exercised		-			-		-		-
Forfeited		(13,047	)		7.36		-		-
Expired		(9,054	)		14.39		-		-
Outstanding as of June 30, 2023		3,074,128		$	9.64		8.50	$	-
Vested and expected to vest at June 30, 2023		3,074,128		$	9.64		8.50	$	-
Exercisable as of June 30, 2023		1,094,454			16.23		7.44		-

Schedule of total stock-based compensation costs

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2023		2022		2023		2022
Restricted stock units	$	326	$	390	$	640	$	704
Stock options		1,292		1,552		2,553		3,117
Total	$	1,618	$	1,942	$	3,193	$	3,821

Schedule of stock-based compensation expense

	For the Three Months ended June 30,				For the Six Months Ended June 30,
	2023		2022		2023		2022
Research and development	$	414	$	423	$	814	$	789
General and administrative		1,204		1,519		2,379		3,032
Total	$	1,618	$	1,942	$	3,193	$	3,821