Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Stock-based Compensation [Abstract]

Stock Option Activity

The following table summarizes stock option activity for the three months ended March 31, 2023:

	Number of Shares			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term (in years)
Outstanding at January 1, 2023		4,474,714		$	1.72
Granted		—		$	—
Exercised		—		$	—
Forfeited and expired		(10,000	)	$	1.45
Outstanding at March 31, 2023		4,464,714		$	1.72		7.8
Exercisable at March 31, 2023		2,623,841		$	1.82		7.3
Vested and expected to vest		4,464,714		$	1.72		7.8

Summary of Restricted Stock Unit Unvested

Restricted stock units have been issued to certain board members. Restricted stock units unvested are summarized in the following table:

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested at January 1, 2023		119,597		$	0.93
Granted		—		$	—
Vested		(39,866	)	$	0.93
Unvested at March 31, 2023		79,731		$	0.93