Annual report pursuant to Section 13 and 15(d)

SUMMARY OF ACCOUNTING POLICIES, Accounts Receivable (Details)

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SUMMARY OF ACCOUNTING POLICIES, Accounts Receivable (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Accounts Receivable [Abstract]    
Accounts receivable, allowances for contractual credits and doubtful accounts $ 0.2 $ 0.1