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Common Shares - Summary Of Phantom Units Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Current liabilities	$ 1,037		$ 1,037		$ 872
Stock-based compensation expense	$ 148	$ 271	$ 615	$ 855
Phantom Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested, Number of units, beginning of period (in shares)			265,000
Granted, Number of units (in shares)					265,000
Cancelled/forfeited, Number of units (in shares)			(32,667)
Vested, net of shares withheld, Number of units (in shares)			(88,333)
Unvested, Number of units, end of period (in shares)	144,000		144,000		265,000
Weighted average remaining contractual term			1 year 3 months		1 year 6 months
Current liabilities	$ 14		$ 14
Stock-based compensation expense	$ 28	$ 11	$ 72	$ 11

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.

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

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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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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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