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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of significant assumptions

The significant assumptions used in the Monte Carlo simulation are presented in the following table.

						Year ended December 31,
						2022
Expected volatility						90.3		%
Expected life (years)						3.0
Risk-free interest rate						2.81		%

Unrecognized compensation expense is expected to be recognized

At December 31, 2022, the Company had unrecognized compensation expense of $6,278 related to granted but unvested stock awards. That expense is expected to be recognized as follows:

Year Ended December 31,
2023			$	2,858
2024			2,022
2025			1,116
2026			282
2027			—
			$	6,278

Summary of restricted stock activity

The following table summarizes restricted stock activity under the 2016 Plan from January 1, 2021 through December 31, 2022:

			Number of Shares						Weighted Average
Unvested, January 1, 2021			1,886						$	5.14
Granted			2,013						$	2.88
Vested			(548)						$	7.11
Forfeiture			(200)						$	5.71
Unvested, December 31, 2021			3,151						$	3.06
Granted			1,172						$	3.30
Vested			(975)						$	3.54
Forfeiture			(618)						$	2.69
Unvested December 31, 2022			2,730						$	3.06

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Tabular disclosure of the changes in outstanding nonvested restricted stock shares.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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