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Loss Per Share (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Stock Options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from computation of loss per share 964 1,044
Warrants    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from computation of loss per share 2,638 30
Restricted Stock Units    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from computation of loss per share 340 118