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Description of the Company and Basis of Presentation - Revised Consolidated Statements of Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Revision of Previously Issued Financial Statements
Net income	$ (1,678)	$ (2,025)	$ 4	$ 11,847	$ (2,511)	$ (6,056)	$ (3,699)	$ 3,280
Other comprehensive loss
Comprehensive income (loss)	$ 1,771			8,813			$ (4,094)	(210)
As Previously Reported
Revision of Previously Issued Financial Statements
Net income			98	11,872	(2,461)	(5,671)		3,739
Other comprehensive loss
Comprehensive income (loss)				8,838				249
Adjustment
Revision of Previously Issued Financial Statements
Net income			$ (94)	(25)	$ (50)	$ (385)		(459)
Other comprehensive loss
Comprehensive income (loss)				$ (25)				$ (459)

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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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