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Stock Award Plan and Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Stock Option Activity for Employees and Non-Employees

Stock option activity for employees and non-employees for the three months ended March 31, 2020 is as follows:

		Shares Issuable Pursuant to Stock Options				Weighted- Average Exercise Price				Weighted- Average Remaining Contractual Terms (years)				Total Intrinsic Value (in thousands)
Outstanding January 1, 2020			9,040,328			$	6.98				7.3			$	7,420
Granted			—			$	—
Exercised			(135,013	)		$	5.91
Forfeited			(105,356	)		$	9.63
Outstanding March 31, 2020			8,799,959			$	6.96				7.1			$	1,625
Exercisable March 31, 2020			5,614,559			$	6.69				6.4			$	1,586
Available for future grant			245,354

Schedule of RSU Activity

RSU activity under the Plan for the three months ended March 31, 2020 is as follows:

						Weighted- Average
						Grant Date
		RSUs				Fair Value
Unvested January 1, 2020			68,650			$	11.29
Granted			—			$	—
Vested			—			$	—
Forfeited			—			$	—
Unvested March 31, 2020			68,650			$	11.29

Schedule of Stock-Based Compensation Expense Included in the Company's Consolidated Statements of Operations

The following table presents stock-based compensation expense included in the Company’s consolidated statements of operations:

		Three Months Ended March 31,
		2020				2019
Research and development		$	681,613			$	700,263
General and administrative			1,516,574				1,761,436
Total		$	2,198,187			$	2,461,699

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Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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-Name Accounting Standards Codification
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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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