Number Of Non Employee Directors on the Eclipse Board.

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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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Stock-Based Compensation - Additional Information (Detail) $ in Millions			3 Months Ended
	May 16, 2018 Director shares	May 17, 2017 Director shares	Mar. 31, 2019 USD ($) shares	Mar. 31, 2018 USD ($)
May 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock expense				$ 0.1
May 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock expense			$ 0.1
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation awards, requisite service period			3 years
Restricted Stock [Member] \| May 2017 [Member] \| Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares of common stock issued \| shares		10,212
Number of non employee directors \| Director		3
Restricted Stock [Member] \| May 2018 [Member] \| Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares of common stock issued \| shares	15,476
Number of non employee directors \| Director	3
Restricted Stock [Member] \| May 2018 [Member] \| Board of Directors [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost			$ 0.1
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			$ 0.8
Weighted average period for shares to vest			2 years
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			$ 2.0
Weighted average period for shares to vest			1 year
2014 Long-Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to be issue \| shares			1,666,667
Number of shares are available for future grants \| shares			430,656