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REVENUE - Revenue by customer type and geographic area (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Product revenue: |  |
Product revenue | $ 35,594,520 | $ 31,084,953
United States | Total product sales |  |
Product revenue: |  |
Product revenue | 150,611 | 66,773
Germany | Total product sales |  |
Product revenue: |  |
Product revenue | 13,049,729 | 12,964,806
All other countries | Total product sales |  |
Product revenue: |  |
Product revenue | 22,394,180 | 18,053,374
Direct |  |
Product revenue: |  |
Product revenue | 20,780,463 | 18,987,621
Direct | United States | Total product sales |  |
Product revenue: |  |
Product revenue | 114,611 | 66,773
Direct | Germany | Total product sales |  |
Product revenue: |  |
Product revenue | 13,049,729 | 12,964,806
Direct | All other countries | Total product sales |  |
Product revenue: |  |
Product revenue | 7,616,123 | 5,956,042
Distributors/Strategic Partners |  |
Product revenue: |  |
Product revenue | 14,814,057 | 12,097,332
Distributors/Strategic Partners | United States | Total product sales |  |
Product revenue: |  |
Product revenue | 36,000 | 0
Distributors/Strategic Partners | Germany | Total product sales |  |
Product revenue: |  |
Product revenue | 0 | 0
Distributors/Strategic Partners | All other countries | Total product sales |  |
Product revenue: |  |
Product revenue | $ 14,778,057 | $ 12,097,332

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