| Schedule of stockholders' equity activity |
Activity in equity during the three- and six-month periods ended June 30, 2026 and 2025 was as follows (dollars in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Common Stock | | Additional Paid-In Capital | | Accumulated Deficit | | Total | | | Shares | | Amount | | | | | | 2026 | | | | | | | | | | | | Balances as of December 31, 2025 | 5,223,015 | | | $ | 5 | | | $ | 152,043 | | | $ | (142,480) | | | $ | 9,568 | | | | Stock-based compensation | — | | | — | | | 23 | | | — | | | 23 | | | | Issuance of common stock, net of transaction costs | 80,411 | | | — | | | 173 | | | — | | | 173 | | | | | | | | | | | | | | | | | | | | | | | | | | Net loss | — | | | — | | | — | | | (2,063) | | | (2,063) | | | | Balances as of March 31, 2026 | 5,303,426 | | | 5 | | | 152,239 | | | (144,543) | | | 7,701 | | | | Stock-based compensation | — | | | — | | | 182 | | | — | | | 182 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Net loss | — | | | — | | | — | | | (1,832) | | | (1,832) | | | | Balances as of June 30, 2026 | 5,303,426 | | | $ | 5 | | | $ | 152,421 | | | $ | (146,375) | | | $ | 6,051 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2025 | | | | | | | | | | | | Balances as of December 31, 2024 | 1,035,893 | | | $ | 1 | | | $ | 138,607 | | | $ | (136,097) | | | $ | 2,511 | | | | Stock-based compensation | — | | | — | | | 91 | | | — | | | 91 | | | | Issuance of common stock, net of transaction costs | 365,319 | | — | | | 1,066 | | | — | | | 1,066 | | | | Issuance of common stock upon exercise of warrants, net of transaction costs | 374,718 | | | 1 | | | 888 | | | — | | | 889 | | | | Net loss | — | | | — | | | — | | | (1,665) | | | (1,665) | | | | Balances as of March 31, 2025 | 1,775,930 | | | 2 | | | 140,652 | | | (137,762) | | | 2,892 | | | | Stock-based compensation | — | | | — | | | 90 | | | — | | | 90 | | | | Issuance of common stock, net of transaction costs | 489,341 | | | 1 | | | 1,639 | | | — | | | 1,640 | | | | Issuance of common stock upon exercise of warrants, net of transaction costs | 1,498,872 | | 1 | | | 3,970 | | | — | | | 3,971 | | | | Net loss | — | | | — | | | — | | | (1,616) | | | (1,616) | | | | Balances as of June 30, 2025 | 3,764,143 | | | $ | 4 | | | $ | 146,351 | | | $ | (139,378) | | | $ | 6,977 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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