Annual report pursuant to Section 13 and 15(d)

REVENUES - Accounts Receivable (Details)

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REVENUES - Accounts Receivable (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Accounts receivable $ 10,111 $ 4,077
Allowance for doubtful accounts 0 $ 0
Aclaris    
Accounts receivable $ 1,500