Stock-Based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Nonvested Restricted Stock Outstanding, Beginning balance	213,982	79,925
Nonvested Restricted Stock, Granted	160,146	206,666
Nonvested Restricted Stock, Vested	(298,136)	(5,404)
Nonvested Restricted Stock, Forfeited	(45,992)	(67,205)
Nonvested Restricted Stock Outstanding, Ending balance	30,000	213,982
Weighted Average Grant Date Fair Value Per Share, Beginning balance	$ 3.53	$ 20.64
Weighted Average Grant Date Fair Value Per Share, Granted	1.13	3.36
Weighted Average Grant Date Fair Value Per Share, Vested	1.68	10.00
Weighted Average Grant Date Fair Value Per Share, Forfeited	4.86	22.84
Weighted Average Grant Date Fair Value Per Share, Ending balance	$ 7.03	$ 3.53

Nonvested Restricted Stock Outstanding,

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- Definition

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
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- Definition

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 weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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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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