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Software, Net (Narrative) (Details)
12 Months Ended
Dec. 31, 2018
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Estimated useful life of software 3 years
Future amortization expense related to software in 2019 $ 398,000
Future amortization expense related to software in 2020 398,000
Future amortization expense related to software in 2021 $ 341,000