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Stockholders' Equity - Summary of Restricted Stock Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Weighted Average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 13.17	$ 12.70
Granted (in dollars per share)	2.44	3.10
Vested (in dollars per share)	3.96	11.15
Canceled (in dollars per share)	12.40	11.65
Outstanding at end of period (in dollars per share)	$ 8.64	$ 13.17
Restricted Stock Units (RSUs)
Restricted Stock Outstanding
Beginning balance (in shares)	6,603	109,371
Granted (in shares)	19,200	17,115
Vested (in shares)	(20,068)	(87,256)
Canceled (in shares)	(1,255)	(32,627)
Ending balance (in shares)	4,480	6,603

X

- Definition

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

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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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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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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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