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ACCRUED LIABILITIES (Tables) | 6 Months Ended
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Jun. 30, 2026
ACCRUED LIABILITIES |
Schedule of accrued liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ | ​ ​ ​ | 2026 | ​ ​ ​ | 2025
Compensation and fringe benefits | ​ | $ | 16,676 | ​ | $ | 20,498
Warranty reserve | ​ |  | 2,179 | ​ |  | 1,813
Income taxes payable | ​ | ​ | 670 | ​ | ​ | 1,853
Operating lease liabilities – current | ​ | ​ | 5,492 | ​ | ​ | 5,323
Finance lease obligations – current | ​ | ​ | 483 | ​ | ​ | 486
Contract liabilities | ​ | ​ | 3,955 | ​ | ​ | 3,767
Restructuring related accruals | ​ | ​ | 229 | ​ | ​ | 521
Other accrued expenses | ​ |  | 7,924 | ​ |  | 6,629
​ | ​ | $ | 37,608 | ​ | $ | 40,890
Schedule of changes in restructuring expenses | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​
​ | ​ | Restructuring | ​
​ | ​ ​ ​ | related accruals | ​
​ | ​ | ​ | ​ | ​
Restructuring liability at December 31, 2025 | ​ | $ | 521 | ​
Expenses incurred | ​ | ​ | 862 | ​
Cash payments | ​ | ​ | (1,172) | ​
Restructuring liability at March 31, 2026 | ​ | $ | 211 | ​
Expenses incurred | ​ | ​ | 641 | ​
Cash payments | ​ | ​ | (623) | ​
Restructuring liability at June 30, 2026 | ​ | $ | 229 | ​
​ | ​ | ​ | ​ | ​
​

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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