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Equity Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2020

Equity Incentive Plans

Summary of Stock-Based Compensation Expense Recognized

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Three Months Ended September 30,

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Nine Months Ended September 30,

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2020

2019

2020

2019

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Research and development

$

963

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$

1,670

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$

3,165

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$

3,197

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General and administrative

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1,564

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2,209

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4,984

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4,527

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Total

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$

2,527

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$

3,879

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$

8,149

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$

7,724

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Summary of Total Unrecognized Stock-Based Compensation Expense, Net of Estimated Forfeitures

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​	​	​	​	​	​	​
​	​	Unrecognized Compensation Expense			​	Average Remaining Vesting Period (Years)
Stock options		$	14,605	​	​	2.8
ESPP		$	186	​	​	0.2

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