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RELATED PARTY - Narrative (Details) - Convertible Notes - Notes due 2023 - USD ($)	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2018	Aug. 31, 2018
Related Party Transaction [Line Items]
Debt instrument face amount	$ 5,000,000	$ 5,000,000		$ 65,000,000
Thurman John Rodgers
Related Party Transaction [Line Items]
Debt instrument face amount	$ 5,000,000	$ 5,000,000	$ 5,000,000

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