Stock-Based Compensation - Summary of Restricted Stock Unit Activity (Details) - Restricted Stock Units - 2019 Plan and Inducement Plan $ / shares in Units, $ in Thousands	9 Months Ended
Sep. 30, 2020 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested Restricted Stock Units, Number of Shares, Beginning Balance \| shares	120,000
Unvested Restricted Stock Units, Number of Shares, granted \| shares	619,990
Restricted Stock Units, Number of Shares, vested \| shares	(76,331)
Unvested Restricted Stock Units, Number of Shares, cancelled \| shares	(16,449)
Unvested Restricted Stock Units, Number of Shares, Ending Balance \| shares	647,210
Unvested Restricted Stock Units, Weighted-Average Grant Date Fair Value, Beginning Balance \| $ / shares	$ 8.86
Unvested Restricted Stock Units, Weighted-Average Grant Date Fair Value, granted \| $ / shares	9.08
Restricted Stock Units, Weighted-Average Grant Date Fair Value, vested \| $ / shares	6.37
Unvested Restricted Stock Units, Weighted-Average Grant Date Fair Value, cancelled \| $ / shares	6.50
Unvested Restricted Stock Units, Weighted-Average Grant Date Fair Value, Ending Balance \| $ / shares	$ 9.42
Unvested Restricted Stock Units, Aggregate Fair Value \| $	$ 1,308
Restricted Stock Units, Aggregate Fair Value, vested \| $	1,287
Unvested Restricted Stock Units, Aggregate Fair Value \| $	$ 14,025

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options.

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No definition available.

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