Quarterly report pursuant to Section 13 or 15(d)

Recent Accounting Pronouncements - Narrative (Details)

v3.20.1
Recent Accounting Pronouncements - Narrative (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Stockholders' equity $ 228,633 $ 344,451 $ 346,078 $ (623,775) $ (588,975)
Prepaid and other current assets 24,723   $ 25,195    
Accumulated Deficit          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Stockholders' equity $ (148,963) (34,958)   $ (1,068,064) $ (1,036,294)
Revision of Prior Period, Accounting Standards Update, Adjustment          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Stockholders' equity   (1,627)      
Prepaid and other current assets   (1,627)      
Revision of Prior Period, Accounting Standards Update, Adjustment | Accumulated Deficit          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Stockholders' equity   $ (1,627)