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Equity and Stock-Based Compensation (Issuance Activity) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Class of Stock [Line Items]    
Gross proceeds received $ 18,181 $ 0
Common Stock    
Class of Stock [Line Items]    
Common shares issued (in shares) 2,005,000 0
Gross proceeds received $ 11,827 $ 0
Commissions and other expenses 148 0
Net proceeds $ 11,679 $ 0