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ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables) | 6 Months Ended
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Jun. 30, 2022
ACCUMULATED OTHER COMPREHENSIVE LOSS |
Schedule of accumulated other comprehensive loss | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six months ended
​ | ​ | June 30,
(in thousands) | ​ | 2022 | ​ | 2021
Balance at beginning of the period | ​ | $ | (2,576) | ​ | $ | (1,947)
Change during the period: | ​ |  | ​ | ​ |  | ​
Amortization of net loss (1) | ​ |  | 44 | ​ |  | 28
Balance at end of the period | ​ | $ | (2,532) | ​ | $ | (1,919)
| (1) | Reported as part of Selling, general and administrative expenses in the accompanying Consolidated Statements of Operations.

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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