Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of stock option activities

	March 31, 2023
	Number of Options (in thousands)			Weighted-Average Exercise Price
Outstanding at beginning of period		668		$	5.22
Granted		561			1.24
Exercised		(67	)		.48
Forfeited		(54	)		9.54
Cancelled		–			–
Expired		–			–
Outstanding at March 31, 2023		1,108		$	3.28
Options exercisable at March 31, 2023		337		$	10.77

Valuation assumptions for stock-based compensation

	For Three Months Ended March 31, 2023		For Three Months Ended March 31, 2022
Weighted average grant date fair value	$	1.08	$	3.34
Weighted average assumptions used:
Expected dividend yield		0.0%		0.0%
Risk-free interest rate		3.69%		0.88%
Expected volatility		115.4%		133.0%
Expected life (in years)		6.5		6.6