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Accumulated Other Comprehensive Income | 9 Months Ended
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Sep. 30, 2021
Accumulated Other Comprehensive Income |
Accumulated Other Comprehensive Income | (9) Accumulated Other Comprehensive Income ​ The changes in accumulated other comprehensive income, which is reported as a component of stockholders’ equity, for the nine months ended September 30, 2021 are summarized below: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Loss on | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Marketable | ​ | Foreign | ​ | ​ | ​
​ |  | Securities |  | Currency Items |  | Total
​ | ​ | (In thousands)
Balance at December 31, 2020 | ​ | $ | (7) | ​ | $ | 2,596 | ​ | $ | 2,589
Other comprehensive loss | ​ |  | (41) | ​ |  | — | ​ |  | (41)
Balance at September 30, 2021 | ​ | $ | (48) | ​ | $ | 2,596 | ​ | $ | 2,548
​ No amounts were reclassified out of accumulated other comprehensive income during the nine months ended September 30, 2021.

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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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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