Equity Award Exchange Percentage of Award

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- Definition

Percent of payout for performance based stock units

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- Definition

Remaining contract life of exercisable stock option.

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Remaining contract life of outstanding stock options.

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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- Definition

Amount of cost capitalized for award under share-based payment arrangement.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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- Definition

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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- Definition

Amount of noncash expense for share-based payment arrangement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Paragraph 28
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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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

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- Definition

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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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- Definition

Expected term of 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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Share-Based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Dec. 31, 2020	May 21, 2019	Feb. 20, 2018	Dec. 31, 2020	Dec. 31, 2019	Apr. 02, 2019
Stock-Based Compensation Plan
Share-based compensation expenses				$ 4,557	$ 6,148
Share-based Payment Arrangement, Amount Capitalized				$ 200	500
Shares available for future grant under stock compensation plans	726,723			726,723
Employee Savings Plan [Abstract]
Employee Savings Plan, Employer Matching Contribution, Percent				100.00%
Employee Savings Plan, Maximum Annual Contribution Per Employee, Percent				6.00%
Employee Savings Plan, Employer Discretionary Contribution Amount				$ 600	600
General and Administrative Expense [Member]
Stock-Based Compensation Plan
Share-based compensation expenses				4,600	$ 6,100
Share-based Payment Arrangement, Option - Equity Exchange Award [Member]
Stock Option Awards
Unrecognized compensation cost related to stock awards						$ 1,200
Share-based Payment Arrangement, Option [Member]
Stock Option Awards
Unrecognized compensation cost related to stock awards	$ 600			600
Outstanding stock options aggregate intrinsic value	0			$ 0
Remaining contract life of outstanding stock options.				4 years 9 months 18 days
Remaining contract life of exercisable stock option				4 years
Intrinsic value of exercised stock option				$ 0
Restricted Stock Units (RSUs) [Member]
Stock-Based Compensation Plan
Equity Award Exchange Percentage of Award						50.00%
Stock Option Awards
Unrecognized compensation cost related to stock awards	2,400			$ 2,400
Restricted Stock Units [Abstract]
Weighted average recognition period of cost related to stock awards				1 year 1 month 6 days
Performance Share Units [Abstract]
Restricted stock units granted				397,285
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 2.83
Restricted stock units vested				158,726
Performance-based stock unit [Member]
Stock-Based Compensation Plan
Equity Award Exchange Percentage of Award						50.00%
Stock Option Awards
Unrecognized compensation cost related to stock awards	$ 1,000			$ 1,000
Restricted Stock Units [Abstract]
Weighted average recognition period of cost related to stock awards	1 year
Performance Share Units [Abstract]
Restricted stock units granted		99,500	30,700
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 18.86	$ 41.66
Percent of payout for performance based stock units	100.00%	112.90%	150.61%	100.00%
Restricted stock units vested				0
Minimum Payout [Member] \| Share-based Payment Arrangement, Option [Member]
Restricted Stock Units [Abstract]
Vesting period				1 year
Minimum Payout [Member] \| Restricted Stock Units (RSUs) [Member]
Restricted Stock Units [Abstract]
Vesting period				1 year
Minimum Payout [Member] \| Performance-based stock unit [Member]
Performance Share Units [Abstract]
Percent of payout for performance based stock units		0.00%	0.00%
Maximum Payout [Member] \| Share-based Payment Arrangement, Option [Member]
Restricted Stock Units [Abstract]
Vesting period				5 years
Maximum Payout [Member] \| Restricted Stock Units (RSUs) [Member]
Restricted Stock Units [Abstract]
Vesting period				5 years
Maximum Payout [Member] \| Performance-based stock unit [Member]
Performance Share Units [Abstract]
Percent of payout for performance based stock units		200.00%	200.00%
Performance Period for Award				3 years