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Schedule of preferred stock (Details) - USD ($) | Sep. 30, 2025 | Dec. 31, 2024
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Class of Stock [Line Items] |  |
Preferred stock, par value per share | $ 0.001 | $ 0.001
Preferred stock, shares authorized | 25,000,000 | 25,000,000
Liquidation preference | $ 87,025,000 | $ 75,521,000
Preferred stock, shares issued | 2,296,188 | 2,029,450
Preferred stock, shares outstanding | 2,296,188 | 2,029,450
Series A Convertible Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, par value per share | $ 0.001 | $ 0.001
Preferred stock, stated value per share | $ 25 | $ 25
Preferred stock, shares authorized | 1,000,000 | 1,000,000
Liquidation preference | $ 176,000 | $ 176,000
Preferred stock, shares issued | 7,040 | 7,040
Preferred stock, shares outstanding | 7,040 | 7,040
Series B Convertible Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, par value per share | $ 0.001 |
Preferred stock, stated value per share | $ 1,000 |
Preferred stock, shares authorized | 60,000 |
Liquidation preference |  |
Preferred stock, shares issued |  |
Preferred stock, shares outstanding |  |
Series C Convertible Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, par value per share | $ 0.001 | $ 0.001
Preferred stock, stated value per share | $ 1,000 | $ 1,000
Preferred stock, shares authorized | 75,000 | 75,000
Liquidation preference | $ 50,000,000 | $ 50,000,000
Preferred stock, shares issued | 50,000 | 50,000
Preferred stock, shares outstanding | 50,000 | 50,000
Series D Cumulative Redeemable Perpetual Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, par value per share | $ 0.001 | $ 0.001
Preferred stock, stated value per share | $ 25 | $ 25
Preferred stock, shares authorized | 2,000,000 | 2,000,000
Liquidation preference | $ 14,640,000 | $ 8,096,000
Preferred stock, shares issued | 585,613 | 323,835
Preferred stock, shares outstanding | 585,613 | 323,835
Series E Cumulative Redeemable Perpetual Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, par value per share | $ 0.001 | $ 0.001
Preferred stock, stated value per share | $ 25 | $ 25
Preferred stock, shares authorized | 2,500,000 | 2,500,000
Liquidation preference | $ 16,250,000 | $ 16,250,000
Preferred stock, shares issued | 649,998 | 649,998
Preferred stock, shares outstanding | 649,998 | 649,998
Series F Exchangeable Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, par value per share | $ 0.001 | $ 0.001
Preferred stock, stated value per share | $ 1,000 | $ 1,000
Preferred stock, shares authorized | 1,000,000 | 1,000,000
Liquidation preference | $ 999,000 | $ 999,000
Preferred stock, shares issued | 998,577 | 998,577
Preferred stock, shares outstanding | 998,577 | 998,577
Series G Convertible Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, par value per share | $ 0.001 | $ 0.001
Preferred stock, stated value per share | $ 1,000 | $ 1,000
Preferred stock, shares authorized | 25,000 | 25,000
Liquidation preference | $ 960,000 |
Preferred stock, shares issued | 960 |
Preferred stock, shares outstanding | 960 |
Series H Convertible Preferred Stock [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, par value per share | $ 0.001 |
Preferred stock, stated value per share | $ 1,000 |
Preferred stock, shares authorized | 100,000 |
Liquidation preference | $ 4,000,000 |
Preferred stock, shares issued | 4,000 |
Preferred stock, shares outstanding | 4,000 |
Unallocated Shares [Member] |  |
Class of Stock [Line Items] |  |
Preferred stock, shares authorized | 18,240,000 | 18,400,000
Liquidation preference |  |
Preferred stock, shares issued |  |
Preferred stock, shares outstanding |  |

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