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OVERVIEW AND BASIS OF PRESENTATION (Tables) | 12 Months Ended
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Dec. 31, 2024
OVERVIEW AND BASIS OF PRESENTATION [Abstract] |
Restrictions on Cash and Cash Equivalents [Table Text Block] | The following table provides a reconciliation of cash, cash equivalents and restricted cash reported in the Consolidated Balance Sheets that sum to the amounts reported in the Consolidated Statement of Cash Flows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | December 31, 2024 |  | December 31, 2023 |  | December 31, 2022 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents | ​ | ​ | $ | 84,991 |  | $ | 172,747 |  | $ | 153,435 | ​
Restricted cash included in "Prepaid and other current assets" | ​ | ​ |  | — | ​ |  | 1,158 | ​ |  | 13,629 | ​
Total | ​ | ​ | $ | 84,991 |  | $ | 173,905 |  | $ | 167,064 | ​
Schedule of property, plant and equipment useful lives | Depreciation and amortization are computed on the straight-line method based on the following estimated useful lives:
​ | ​ | ​
Building |  | 30 years
Computer equipment and software |  | 3 to 7 years
Telephone equipment |  | 4 to 7 years
Furniture and fixtures |  | 5 years
Leasehold improvements |  | Lesser of economic useful life (typically 10 years) or original lease term
Other |  | 3 to 7 years

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- Definition Tabular disclosure of cash and cash equivalents restricted as to withdrawal or usage. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 8 -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-8 + Details
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