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Stock-Based Compensation - Summary of Restricted Stock Activity (Details) - Restricted Stock [Member]	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Number of Restricted shares, Non-vested Beginning Balance | shares	772,150
Number of Restricted shares, Granted | shares	522,110
Number of Restricted shares, Vested | shares	(397,790)
Number of Restricted shares, Forfeited | shares	(2,500)
Number of Restricted shares, Non-vested Ending Balance | shares	893,970
Weighted average grant date fair value, Non-vested Beginning Balance | $ / shares	$ 3.40
Weighted average grant date fair value, Granted | $ / shares	2.91
Weighted average grant date fair value, Vested | $ / shares	(3.84)
Weighted average grant date fair value, Forfeited | $ / shares	(2.30)
Weighted average grant date fair value, Non-vested Ending Balance | $ / shares	$ 2.92

X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(3)
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- Definition

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).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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- Definition

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).

+ References

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-Paragraph 2
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- Definition

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.

+ References

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-Section 50
-Paragraph 2
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- Definition

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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- Definition

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

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- Definition

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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