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Summary of Significant Accounting Policies - Accounting Pronouncements (Details) - Accounting Standards Update 2016-02 - USD ($)
Mar. 31, 2019
Jan. 01, 2019
Right of use assets, Operating $ 672,000 $ 817,000
Lessee lease liabiity, Operating 672,000 817,000
Lease receivable, Lessor 142,000 174,000
Lease liability, Lessor $ 142,000 $ 174,000