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Operating Segments - Reconciliation to Consolidated Loss Before Income Taxes (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Segment reporting |  |  |  |  |  |  |
Loss from operations | $ (2,763,879) | $ (3,026,508) | $ (1,744,675) | $ (5,790,387) | $ (3,861,766) | $ (9,439,497) | $ (7,697,940)
Interest income (expense), net | 69,823 |  | 35,925 | 145,851 | 64,767 | 213,975 | (49,129)
Other income (expense), net | (7,920) |  | 64,248 | (8,708) | 237,170 | 549,832 | (161,464)
Net loss before income taxes | (2,701,976) |  | (1,644,502) | (5,653,244) | (3,559,829) | (8,675,690) | (7,908,533)
Total Segments |  |  |  |  |  |  |
Segment reporting |  |  |  |  |  |  |
Loss from operations | (1,554,250) |  | (345,258) | (3,390,940) | (1,251,859) | (4,619,610) | (2,848,834)
Net loss before income taxes | (1,554,250) |  | (376,604) | (3,390,940) | (1,275,665) | (4,641,952) | (2,823,567)
Corporate |  |  |  |  |  |  |
Segment reporting |  |  |  |  |  |  |
Loss from operations | (1,209,629) |  | (1,399,417) | (2,399,447) | (2,609,907) | (4,819,887) | (4,849,106)
Net loss before income taxes | $ (1,147,726) |  | $ (1,267,898) | $ (2,262,304) | $ (2,284,164) | $ (4,033,738) | $ (5,084,966)

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