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Stock-Based Compensation (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
shares
Sep. 30, 2019
USD ($)
shares
Sep. 30, 2020
USD ($)
qtr
shares
Sep. 30, 2019
USD ($)
shares
Stock Option [Member]        
Share-based Compensation [Abstract]        
Stock-based compensation expense $ 33 $ 169 $ 357 $ 1,238
Restricted Stock Units [Member]        
Share-based Compensation [Abstract]        
Stock-based compensation expense $ 0 $ (60) $ 6 $ 88
Granted time-based RSUs (in shares) | shares 130,000 8,500 170,000 509,000
Aggregate fair value for time-based RSUs $ 122 $ 20 $ 175 $ 1,400
Number of quarters time-based RSU's will vest quarterly | qtr     8  
Vesting period of performance based RSU's     3 years  
Granted performance-based RSUs (in shares) | shares 0   512,000 350,000
Aggregate fair value for performance-based RSUs     $ 570 $ 900
Cumulative adjustment $ 100 $ 200    
Restricted Stock Units [Member] | Minimum [Member]        
Share-based Compensation [Abstract]        
Period in which time-based RSU's will vest annually in equal amounts     1 year  
Requisite service period for time-based RSU's     1 year  
Restricted Stock Units [Member] | Maximum [Member]        
Share-based Compensation [Abstract]        
Period in which time-based RSU's will vest annually in equal amounts     3 years  
Requisite service period for time-based RSU's     3 years