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Other comprehensive income (loss) and accumulated other comprehensive items

12 Months Ended

Dec. 31, 2020

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Other comprehensive income (loss) and accumulated other comprehensive items

12. Other comprehensive income (loss) and accumulated other comprehensive items

Other comprehensive income (loss) includes changes in equity that are excluded from net loss, such as unrealized gains and losses on marketable securities.

The following table summarizes other comprehensive income (loss) and the changes in accumulated other comprehensive items, by component, for the years ended December 31, 2020, 2019, and 2018, respectively.

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​	​	​	​	​	​	​	​	​	​
​		Unrealized			​	​		Total
​	​	Gains		​	​	​	​	Accumulated
​	​	On		​	Foreign		​	Other
​	​	Marketable		​	Currency		​	Comprehensive
​	​	Securities, net of tax		​	Translation		​	Items
Balance at December 31, 2017	​	$	22	​	$	3,947	​	$	3,969
Other comprehensive income (loss) before reclassifications	​		9	​		(2,516)	​		(2,507)
Amounts reclassified from other comprehensive items	​		—	​		—	​		—
Other comprehensive income (loss)	​		9	​		(2,516)	​		(2,507)
Balance at December 31, 2018	​	$	31	​	$	1,431	​	$	1,462
Other comprehensive income (loss) before reclassifications	​		724	​		(12,770)	​		(12,046)
Amounts reclassified from other comprehensive items	​		—	​		—	​		—
Other comprehensive income (loss)	​		724	​		(12,770)	​		(12,046)
Balance at December 31, 2019	​	$	755	​	$	(11,339)	​	$	(10,584)
Other comprehensive income (loss) before reclassifications	​		1,145	​		(51,518)	​		(50,373)
Amounts reclassified from other comprehensive items	​		—	​		—	​		—
Other comprehensive income (loss)	​		1,145	​		(51,518)	​		(50,373)
Balance at December 31, 2020	​	$	1,900	​	$	(62,857)	​	$	(60,957)

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- References

No definition available.

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- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-URI http://asc.fasb.org/topic&trid=2134417

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(21))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Section S99
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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-Section S99
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