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Stockholders' Equity - Stock Split (Details)
6 Months Ended
Jun. 02, 2020
Dec. 17, 2019
Jun. 30, 2020
$ / shares
shares
Jun. 11, 2020
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Reverse stock split ratio 0.2   0.2    
Common stock, par value (in usd per share) | $ / shares     $ 0.0001 $ 0.0001 $ 0.0001
Common stock, authorized (in shares) | shares     50,000,000 50,000,000 30,000,000
Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Reverse stock split ratio   0.5      
Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Reverse stock split ratio   0.05