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Note 13 - Major Customers and Vendors | 6 Months Ended
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Jun. 30, 2025
Notes to Financial Statements |
Concentration Risk Disclosure [Text Block] | 13. Major Customers and Vendors: ​ During the three months ended June 30, 2025, the Company had no major vendors, compared to one major vendor that accounted for 10% of total purchases during the three months ended June 30, 2024. During the six months ended June 30, 2025, the Company had no major vendors, compared to one major vendor that accounted for 13% of total purchases during the six months ended June 30, 2024. ​ The Company had three major customers that accounted for 24%, 20% and 13%, respectively, of its net sales during the three months ended June 30, 2025, and 18%, 1% and 18%, respectively, of its net sales during the three months ended June 30, 2024. The Company had three major customers that accounted for 25%, 13% and 13% of net sales during the six months ended June 30, 2025, and 19%, 2% and 16%, of net sales during the six months ended June 30, 2024. These same customers accounted for 18%, 25% and 8% of total net accounts receivable as of June 30, 2025, and 12%, 19% and 6% of total net accounts receivable as of December 31, 2024.

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