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Leases (Schedule of Lease Costs and Other Lease Information) (Details)
 12 Months Ended
Dec. 31, 2019
USD ($)
Operating lease  
Operating lease cost $ 905,000
Short-term lease cost 446,000
Variable lease cost 50,000
Sublease income
Total Rent and occupancy 1,401,000
Cash paid for amounts included in the measurement of lease liabilities  
Operating cash flows from operating leases 928,000
Lease right-of-use assets obtained in exchange for new lease liabilities  
Lease right-of-use assets obtained in exchange for new lease liabilities - operating leases $ 3,817,000