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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration risks (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Concentration risks
Aggregate dollar amount of net sales to significant customers	$ 36,356,047	$ 27,091,064	$ 128,926,716	$ 49,867,126
Department of health and human
Concentration risks
Aggregate dollar amount of net sales to significant customers			$ 83,600,000
Supplier Concentration Risk | China
Concentration risks
Concentration risk, geographic	91.9%	80.5%	90.9%	82.2%

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- Definition

Description of risks that arise due to concentrations of operating facilities, revenues, assets, customers, vendors or the like in a certain geographic area, either domestic or foreign. The description may address risks inherent in the geographic area, and, at a minimum, informs users of the general nature of the risk, but excludes "Information about Geographic Areas" that may be disclosed elsewhere (for instance, segment disclosures)..

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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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