Stockholders' Equity (Restricted Stock Activity Table) (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Restricted stock outstanding, beginning balance	3,059,065	3,057,879
Restricted stock granted	2,380,100	2,024,498
Restricted stock issued	(889,769)	(1,457,538)
Restricted stock forfeited	(676,519)	(565,774)
Restricted stock outstanding, ending balance	3,872,877	3,059,065
Weighted average price - Restricted stock outstanding, beginning balance	$ 7.60	$ 4.05
Weighted average price - Restricted stock granted	11.59	7.60
Weighted average price - Restricted stock issued	12.16	5.27
Weighted average price - Restricted stock forfeited	4.05	4.76
Weighted average price - Restricted stock outstanding, ending balance	$ 11.63	$ 7.60

Restricted stock issued

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- Definition

Weighted average price - Restricted stock issued

+ References

No definition available.

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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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- 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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- 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).

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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).

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- Definition

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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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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