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Related Party Transactions (Tables) | 12 Months Ended
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Dec. 31, 2025
Related Party Transactions |
Schedule of related party transactions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2025 | ​ | 2024
​ | ​ ​ ​ | Due from Qualstar | ​ ​ ​ | Due to Qualstar | ​ ​ ​ | Due from Qualstar | ​ ​ ​ | Due to Qualstar
​ |  | (in thousands)
Balance at January 1, | ​ | $ | 8 | ​ | $ | 12 | ​ | $ | 2 | ​ | $ | 32
Billed (or accrued) to Qualstar by Interlink | ​ |  | 429 | ​ |  | — | ​ |  | 450 | ​ |  | —
Paid by Qualstar to Interlink | ​ |  | (432) | ​ |  | — | ​ |  | (444) | ​ |  | —
Billed (or accrued) to Interlink by Qualstar | ​ |  | — | ​ |  | 187 | ​ |  | — | ​ |  | 158
Paid by Interlink to Qualstar | ​ |  | — | ​ |  | (174) | ​ |  | — | ​ |  | (178)
Balance at December 31, | ​ | $ | 5 | ​ | $ | 25 | ​ | $ | 8 | ​ | $ | 12
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ | 2025 | ​ | 2024
​ | ​ ​ ​ | Due from BKF Capital | ​ ​ ​ | Due to BKF Capital | ​ ​ ​ | Due from BKF Capital | ​ ​ ​ | Due to BKF Capital
​ |  | ​ | (in thousands)
Balance at January 1, | ​ | $ | — | ​ | $ | — | ​ | $ | 2 | ​ | $ | —
Billed (or accrued) to BKF Capital by Interlink | ​ |  | 8 | ​ |  | — | ​ |  | 8 | ​ |  | —
Paid by BKF Capital to Interlink | ​ |  | (5) | ​ |  | — | ​ |  | (10) | ​ |  | —
Billed (or accrued) to Interlink by BKF Capital | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 75
Paid by Interlink to BKF Capital | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (75)
Balance at December 31, | ​ | $ | 3 | ​ | $ | — | ​ | $ | — | ​ | $ | —
​

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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