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ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS (Tables) | 3 Months Ended
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Mar. 31, 2022
ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS [Abstract] |
Schedule of Change in Allowance for Doubtful Accounts | Activity in the Company’s Allowance for credit losses consists of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, |
​ |  | 2022 |  | 2021 |
Balance, beginning of year | ​ | $ | 5,409 | ​ | $ | 5,067 | ​
Provision for credit losses | ​ |  | (185) | ​ |  | 21 | ​
Uncollectible receivables written-off | ​ |  | (213) | ​ |  | (83) | ​
Effect of foreign currency | ​ |  | 21 | ​ |  | (8) | ​
Balance, end of year | ​ | $ | 5,032 | ​ | $ | 4,997 | ​

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- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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