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Commitments and Contingencies Future Payments Used in Measurement of Lease Liabilities (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]      
Sublease Income $ 35,000 $ 0 $ 73,000
Operating leases      
Remainder of 2020   411,000  
2021   707,000  
2022   668,000  
2023   290,000  
2024   112,000  
Thereafter   0  
Total undiscounted lease payments   2,188,000  
Less amount representing interest   (332,000)  
Present value of lease liabilities   1,856,000  
Finance leases      
Remainder of 2020   45,000  
2021   80,000  
2022   5,000  
2023   0  
2024   0  
Thereafter   0  
Total undiscounted lease payments   130,000  
Less amount representing interest   (5,000)  
Present value of lease liabilities   $ 125,000