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Schedule of Estimated Amortization Expense, Intangible Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]    
2019 (remainder of year from April 1, 2019 to December 31, 2019) $ 177  
2020 236  
2021 236  
2022 128  
2023 125  
Thereafter 229  
Total $ 1,131 $ 1,190