Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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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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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of equity-based compensation, related to witholding restricted stock units or restricted stock awards, recognized as expense or an asset, if compensation is capitalized

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Grant Date Fair Value

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Period

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Represents period of plan.

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Restricted Stock - Narrative (Details) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Stock Options Warrants And Restricted Stock Textual [Abstract]
Payment of withholding taxes on restricted stock units		$ (887)	$ (2,722)	$ (268)
Restricted stock
Stock Options Warrants And Restricted Stock Textual [Abstract]
Restricted stock granted		957	454	604
Payment of withholding taxes on restricted stock units		$ 887	$ 2,722	$ 268
Total unrecognized compensation cost related to nonvested restricted stock awards granted		$ 5,853
Weighted average period for recognition		2 years 1 month 6 days
2013 Plan
Stock Options Warrants And Restricted Stock Textual [Abstract]
Issuance of common stock to directors, employees, consultants and advisors (in shares)	5,000
Term of the plan	10 years
Number of shares available for grant (in shares)		1,943
Employees \| Restricted stock
Stock Options Warrants And Restricted Stock Textual [Abstract]
Restricted stock vesting period		3 years
Director \| Restricted stock
Stock Options Warrants And Restricted Stock Textual [Abstract]
Restricted stock vesting period		9 years
Certain Executives and Employees \| Restricted stock
Stock Options Warrants And Restricted Stock Textual [Abstract]
Restricted stock granted		287	182	409
Forfeited in period fair value		$ 2,840