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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration risks (Details) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
May 14, 2025 | Sep. 13, 2024 | Apr. 30, 2025 | Jun. 30, 2025 USD ($) customer | Jun. 30, 2024 USD ($) customer | Dec. 31, 2025 | Jun. 30, 2025 USD ($) customer | Jun. 30, 2024 USD ($) customer
Concentration risks |  |  |  |  |  |  |  |
Aggregate dollar amount of net sales |  |  |  | $ 10,445,733 | $ 6,029,364 |  | $ 18,740,906 | $ 13,628,727
Syringes and needles | China |  |  |  |  |  |  |  |
Concentration risks |  |  |  |  |  |  |  |
Tariff percentage |  | 100.00% |  |  |  |  |  |
Syringes and needles | China | Forecast |  |  |  |  |  |  |  |
Concentration risks |  |  |  |  |  |  |  |
Tariff percentage |  |  |  |  |  | 130.00% |  |
Other products |  |  |  |  |  |  |  |
Concentration risks |  |  |  |  |  |  |  |
Aggregate dollar amount of net sales |  |  |  | $ 19,131 | $ 17,388 |  | $ 26,815 | $ 25,366
Other products | China |  |  |  |  |  |  |  |
Concentration risks |  |  |  |  |  |  |  |
Tariff percentage | 30.00% |  | 145.00% |  |  |  |  |
Other products | China | Forecast |  |  |  |  |  |  |  |
Concentration risks |  |  |  |  |  |  |  |
Tariff percentage |  |  |  |  |  | 30.00% |  |
Net Sales | Customer Concentration Risk |  |  |  |  |  |  |  |
Concentration risks |  |  |  |  |  |  |  |
Number of significant customers | customer |  |  |  | 3 | 4 |  | 3 | 3
Net Sales | Customer Concentration Risk | Significant customers |  |  |  |  |  |  |  |
Concentration risks |  |  |  |  |  |  |  |
Aggregate dollar amount of net sales |  |  |  | $ 6,000,000 | $ 3,800,000 |  | $ 10,300,000 | $ 7,300,000
Concentration risk, percentage |  |  |  | 57.20% | 63.00% |  | 55.00% | 53.60%
Cost of Sales, Manufacturing | Supplier Concentration Risk | China |  |  |  |  |  |  |  |
Concentration risks |  |  |  |  |  |  |  |
Concentration risk, percentage |  |  |  | 62.00% | 92.00% |  | 62.00% | 91.00%

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