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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of significant assumptions

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

			Years ended December 31,
			2019						2018
Expected volatility			71.05		%				67.13		%
Expected life (years)			2.0						2.7
Risk-free interest rate			1.63		%				2.55		%

Unrecognized compensation expense is expected to be recognized

At December 31, 2019, the Company had unrecognized compensation expense of $7,598 related to granted but unvested stock awards. That expense is expected to be recognized as follows:

Year Ended December 31,
2020			$	3,849
2021			2,349
2022			885
2023			515
			$	7,598

Summary of restricted stock activity

The following table summarizes restricted stock activity under the Plans from January 1, 2018 through December 31, 2019:

			Number of Shares						Weighted Average
Unvested, January 1, 2018			534						$	11.27
Granted			746						$	6.61
Vested			(177)						$	12.15
Forfeiture			(76)						$	11.56
Unvested, December 31, 2018			1,027						$	9.83
Granted			1,884						$	2.58
Vested			(261)						$	8.76
Forfeiture			(32)						$	5.85
Unvested December 31, 2019			2,618						$	6.91

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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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