Amount for accounts payable to related parties.

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COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2020	Dec. 31, 2020	Sep. 30, 2022	Mar. 20, 2020
Fortis
Loss Contingencies [Line Items]
Loss contingency, damages sought	$ 30.0
Hong Kong Pharma Tainuo Ltd.
Loss Contingencies [Line Items]
Accounts payable, related parties			$ 10.0
Hong Kong Pharma Tainuo Ltd. \| Flexion
Loss Contingencies [Line Items]
Proceeds from development and commercialization of ZILRETTA		$ 10.0
Maximum milestone payment to be received				$ 32.5