Number Of Non Employee Directors on the Eclipse Board.

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Number of officers.

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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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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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

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Percentage of vesting of award under share-based payment arrangement.

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Stock-Based Compensation - Additional Information (Detail) $ in Millions								12 Months Ended
	Oct. 08, 2019 Director shares	Aug. 02, 2019 Director shares	Jun. 18, 2019 Director shares	Feb. 28, 2019 Officer shares	May 16, 2018 Director shares	May 17, 2017 Director shares	May 18, 2016 Director shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2017 USD ($)
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation awards, requisite service period								3 years
Unrecognized compensation cost \| $								$ 2.4
Weighted average period for units to vest								1 year
Restricted Stock Units [Member] \| Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost \| $								$ 0.9
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation awards, requisite service period								3 years
Unrecognized compensation cost \| $								$ 1.7
Weighted average period for units to vest								2 years
Fair value of performance stock units vested \| $								$ 3.7	$ 0.8
Restricted Stock [Member] \| Board of Directors [Member] \| May 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock issued							9,963
Number of non employee directors \| Director							3
Restricted Stock [Member] \| Board of Directors [Member] \| May 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock issued						10,212
Number of non employee directors \| Director						3
Restricted Stock [Member] \| Board of Directors [Member] \| May 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock issued					15,476
Number of non employee directors \| Director					3
Restricted Stock [Member] \| Board of Directors [Member] \| June 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock issued			53,328
Number of non employee directors \| Director			8
Restricted Stock [Member] \| Officer [Member] \| February 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock issued				70,409
Number of officers \| Officer				2
Restricted Stock [Member] \| Officer [Member] \| February 2019 [Member] \| August 28, 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				25.00%
Restricted Stock [Member] \| Officer [Member] \| February 2019 [Member] \| February 28, 2020, August 28, 2020 and February 28, 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				75.00%
Unrestricted Stock [Member] \| Board of Directors [Member] \| August 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock issued		26,935
Number of non employee directors \| Director		4
Unrestricted Stock [Member] \| Board of Directors [Member] \| October 2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock issued	22,661
Number of non employee directors \| Director	4
2019 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to be issue								2,650,000
Number of shares are available for future grants								1,745,810