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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration risks (Details)			1 Months Ended	3 Months Ended
	May 14, 2025	Sep. 13, 2024	Apr. 30, 2025	Mar. 31, 2025 USD ($) customer	Mar. 31, 2024 USD ($) customer
Concentration risks
Aggregate dollar amount of net sales				$ 8,295,173	$ 7,599,363
Syringes and needles | China
Concentration risks
Tariff percentage		100.00%
Percentage increase in tariffs for syringes and needles		100.00%
Syringes and needles | China | Subsequent Event
Concentration risks
Tariff percentage	130.00%
Other products
Concentration risks
Aggregate dollar amount of net sales				$ 7,684	$ 7,979
Other products | China | Subsequent Event
Concentration risks
Tariff percentage	30.00%		145.00%
Net Sales | Customer Concentration Risk
Concentration risks
Number of significant customers | customer				3	2
Net Sales | Customer Concentration Risk | Significant customers
Concentration risks
Aggregate dollar amount of net sales				$ 4,900,000	$ 3,400,000
Concentration risk, percentage				58.60%	44.30%
Cost of Sales, Manufacturing | Supplier Concentration Risk | China
Concentration risks
Concentration risk, percentage				62.70%	90.40%

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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