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Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Share-Based Payment Arrangement [Abstract]

Summary of Stock Option Awards and Restricted Stock Grants

A summary of stock option awards and restricted stock grants for the three-months ended March 31, 2022 is presented below:

 Summary of Stock Option Awards and Restricted Stock Grants

		Stock Options								Restricted Stock Awards								Weighted Average
		Options Outstanding				Weighted Average Exercise Price				Non-vested Restricted Stock Outstanding				Weighted Average Grant Date Fair Value				Contractual Terms of Equity Awards (in years)
Equity awards outstanding at January 1, 2022			441,425			$	38.49				1,481			$	12.36
Equity awards granted			224,276			$	4.60				400			$	4.60
Equity awards outstanding at March 31, 2022			665,701			$	27.07				1,881			$	10.71				8.0
Aggregate intrinsic value of outstanding equity awards at March 31, 2022		$	103,167							$	20,145
Equity awards exercisable at March 31, 2022			419,559			$	33.22												7.5
Aggregate intrinsic value of equity awards exercisable at March 31, 2022		$	34,304

Schedule of Assumptions Used to Determine Fair Value of Options Granted

 Schedule of Assumptions Used to Determine Fair Value of Options Granted

		Three Months Ended March 31,
		2022				2021
Risk-free interest rate			1.74	%			1.64 to 1.74	%
Expected volatility			108.5	%			106.8 to 112.5	%
Expected life (in years)			8.5 to 9.0				7.5 to 10.0
Expected dividend yield			-	%			-	%

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Summary of Stock Option and Restricted Stock Awards [Table Text Block]

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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