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Adoption of Accounting Standards (Details Textual) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Operating Lease, Right-of-Use Asset $ 890,000 $ 0
Finance Lease, Right-of-Use Asset 3,207,000 0
Operating Lease, Liability 907,000 0
Finance Lease, Liability 3,253,000 $ 0
Accounting Standards Update 2016-02 [Member]    
Operating Lease, Right-of-Use Asset 932,000  
Finance Lease, Right-of-Use Asset 3,300,000  
Operating Lease, Liability 932,000  
Finance Lease, Liability $ 3,300,000