Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY (Parenthetical)

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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Common Stock | At The Market      
Issuance costs   $ 411  
Common Stock | Follow On Offering      
Issuance costs $ 4,600   $ 4,600
Series A Convertible Preferred Stock | Follow On Offering      
Issuance costs $ 400   $ 400