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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration risks (Details) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 14, 2024 | Jun. 30, 2024 USD ($) customer | Jun. 30, 2023 USD ($) customer | Jun. 30, 2024 USD ($) customer | Jun. 30, 2023 USD ($) customer
Concentration risks |  |  |  |  |
Aggregate dollar amount of net sales |  | $ 6,029,364 | $ 7,971,280 | $ 13,628,727 | $ 18,972,382
Net Sales | Customer Concentration Risk |  |  |  |  |
Concentration risks |  |  |  |  |
Number of significant customers | customer |  | 4 | 3 | 3 | 3
Net Sales | Customer Concentration Risk | China |  |  |  |  |
Concentration risks |  |  |  |  |
Percentage of net sales to significant customers |  |  |  | 91.00% |
Net Sales | Customer Concentration Risk | Significant customers |  |  |  |  |
Concentration risks |  |  |  |  |
Aggregate dollar amount of net sales |  | $ 3,800,000 | $ 4,400,000 | $ 7,300,000 | $ 10,200,000
Percentage of net sales to significant customers |  | 63.00% | 55.00% | 53.60% | 53.90%
Cost of Sales, Manufacturing | Supplier Concentration Risk | China |  |  |  |  |
Concentration risks |  |  |  |  |
Percentage of net sales to significant customers |  | 92.00% | 84.00% | 91.00% | 89.00%
Percentage increase in tariffs for syringes and needles | 50.00% |  |  |  |

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