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Leases (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Lessee, Lease, Description [Line Items]          
Lessee, Operating Lease, Renewal Term 5 years   5 years    
Operating Lease, Cost $ 357,000 $ 358,000 $ 714,000 $ 715,000  
Operating Lease, Cost 714,000     $ 715,000  
Operating Lease, Right-of-Use Asset, Noncurrent 3,832,000   3,832,000   $ 4,484,000
Operating Lease, Right-of-Use Asset 3,832,000   3,832,000   4,484,000
Operating Lease, Liability, Current (743,000)   (743,000)   (1,304,000)
Operating Lease, Liability, Noncurrent 3,028,000   3,028,000   3,119,000
Operating Lease, Liability $ 3,771,000   $ 3,771,000   $ 4,423,000
Operating Lease, Weighted Average Remaining Lease Term 3 years 9 months   3 years 9 months   4 years
Operating Lease, Weighted Average Discount Rate, Percent 0.00%   0.00%   0.00%
Lessee, Operating Lease, Liability, to be Paid, Year One $ 716,000   $ 716,000   $ 1,433,000
Lessee, Operating Lease, Liability, to be Paid, Year Two 1,174,000   1,174,000   1,174,000
Lessee, Operating Lease, Liability, to be Paid, Year Three 1,102,000   1,102,000   1,102,000
Lessee, Operating Lease, Liability, to be Paid, Year Four 1,000,000   1,000,000   1,000,000
Lessee, Operating Lease, Liability, to be Paid, Year Five 530,000   530,000   530,000
Lessee, Operating Lease, Liability, to be Paid 4,522,000   4,522,000   5,239,000
Lessee, Operating Lease, Imputed Interest (751,000)   (751,000)   (816,000)
Lessee, Operating Lease, Discounted Lease Payments $ 3,771,000   $ 3,771,000   $ 4,423,000
Minimum [Member]          
Lessee, Lease, Description [Line Items]          
Lessee, Operating Lease, Term of Contract 1 year   1 year    
Maximum [Member]          
Lessee, Lease, Description [Line Items]          
Lessee, Operating Lease, Term of Contract 4 years   4 years