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Revision of Previously Issued Financial Statements - Consolidated Statements of Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pro forma Comprehensive Income
Net income (loss)	$ (1,756)	$ (1,678)	$ (2,023)	$ 4	$ 4,585	$ 11,847	$ (2,511)	$ (6,056)	$ (5,455)	$ 7,864	$ 3,044
Comprehensive income (loss)									$ (2,380)	7,856	(1,675)
As Previously Reported
Pro forma Comprehensive Income
Net income (loss)										8,789	3,846
Comprehensive income (loss)										8,781	(873)
Adjustment
Pro forma Comprehensive Income
Net income (loss)					$ 500					(925)	(802)
Comprehensive income (loss)										$ (925)	$ (802)

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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