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Summary of Significant Accounting Policies (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]    
Beginning balance $ 213,000 $ 141,000
Bad debt provision 6,000 72,000
Accounts written-off (197,000) 0
Ending balance $ 22,000 $ 213,000