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ACCRUED LIABILITIES (Tables) | 6 Months Ended
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Jun. 30, 2025
ACCRUED LIABILITIES |
Schedule of accrued liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2025 |  | 2024
Compensation and fringe benefits | ​ | $ | 14,850 | ​ | $ | 13,134
Warranty reserve | ​ |  | 2,301 | ​ |  | 1,966
Income taxes payable | ​ | ​ | 387 | ​ | ​ | 1,472
Operating lease liabilities – current | ​ | ​ | 5,370 | ​ | ​ | 5,088
Finance lease obligations – current | ​ | ​ | 466 | ​ | ​ | 448
Contract liabilities | ​ | ​ | 3,094 | ​ | ​ | 2,292
Restructuring related accruals | ​ | ​ | 1,610 | ​ | ​ | —
Other accrued expenses | ​ |  | 6,496 | ​ |  | 5,821
​ | ​ | $ | 34,574 | ​ | $ | 30,221
Schedule of changes in restructuring expenses | ​
​ | ​ | ​ | ​
​ | ​ | ​
​ | ​ | Restructuring
​ |  | related accruals
​ | ​ | ​ | ​
December 31, 2024 | ​ | $ | —
Expenses incurred | ​ | ​ | 1,499
Payments | ​ | ​ | (354)
March 31, 2025 | ​ | ​ | 1,145
Expenses incurred | ​ |  | 1,122
Payments | ​ | ​ | (657)
June 30, 2025 | ​ | $ | 1,610
​

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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://fasb.org/us-gaap/role/ref/legacyRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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