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REVENUE AND SEGMENT INFORMATION - Revenue by customer type and geographic area (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Product revenue:
Product revenue	$ 8,727,238	$ 8,989,520
United States | Total product sales
Product revenue:
Product revenue	62,607	39,616
Germany | Total product sales
Product revenue:
Product revenue	2,796,237	3,537,727
All other countries | Total product sales
Product revenue:
Product revenue	5,868,394	5,412,177
Direct
Product revenue:
Product revenue	4,748,214	5,309,884
Direct | United States | Total product sales
Product revenue:
Product revenue	62,607	21,616
Direct | Germany | Total product sales
Product revenue:
Product revenue	2,796,237	3,537,727
Direct | All other countries | Total product sales
Product revenue:
Product revenue	1,889,370	1,750,541
Distributors/Strategic Partners
Product revenue:
Product revenue	3,979,024	3,679,636
Distributors/Strategic Partners | United States | Total product sales
Product revenue:
Product revenue		18,000
Distributors/Strategic Partners | All other countries | Total product sales
Product revenue:
Product revenue	$ 3,979,024	$ 3,661,636

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