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Leases - Lease Costs and Maturity Analysis for Liabilities (Details)
 3 Months Ended
Mar. 31, 2019
USD ($)
payment
Leases  
Right to use asset $ 2,059,192
Option to extend the terms true
Extension term 5 years
Incremental borrowing rate 3.86%
Number of future contractual lease payments | payment 66
Lease Costs  
Operating lease cost $ 105,000
Lease cost 105,000
Cash paid for amounts included in the measurement of lease liabilities $ 103,000
Weighted average remaining lease terms in years - operating leases 5 years 6 months
Weighted average discount rate - operating leases 3.86%
Maturity analysis for liabilities  
Discount rate at commencement 3.86%
2019 $ 310,000
2020 421,000
2021 429,000
2022 438,000
2023 447,000
2024 and thereafter 340,000
Total undiscounted cash flows 2,385,000
Present value lease liability 2,141,000
Difference between undiscounted cash flows and discounted cash flows $ 244,000