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Summary of Significant Accounting Policies (Cumulative Effect of Changes from Adoption of ASU) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
ASSETS      
Right of use assets $ 604 $ 451 $ 0
Liabilities [Abstract]      
Current operating leases 189 126 0
Long-term operating leases 415 325 0
Total lease liabilities $ 604 451 $ 0
Accounting Standards Update 2016-02      
ASSETS      
Right of use assets   451  
Liabilities [Abstract]      
Current operating leases   126  
Long-term operating leases   325  
Total lease liabilities   $ 451