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STOCK-BASED COMPENSATION (Tables) | 6 Months Ended
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Jun. 30, 2024
STOCK-BASED COMPENSATION |
Schedule of stock-based compensation expense | Total stock-based compensation expense was as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended | ​ | Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ | ​ | 2024 | ​ | 2023 | ​ | 2024 | ​ | 2023
Cost of sales | ​ | $ | 5 | ​ | $ | 5 | ​ | $ | 9 | ​ | $ | 9
Selling, general and administrative | ​ |  | 298 | ​ |  | 339 | ​ | ​ | 628 | ​ | ​ | 659
Research and development | ​ | ​ | 64 | ​ | ​ | 76 | ​ | ​ | 130 | ​ | ​ | 157
Total stock-based compensation expense | ​ | $ | 367 | ​ | $ | 420 | ​ | $ | 767 | ​ | $ | 825

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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