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Summary of Significant Accounting Policies - Schedule of Cumulative Effect of Adoption of ASU 2017-11 (Details) - USD ($)
$ in Thousands
Jan. 02, 2019
Dec. 31, 2018
Jun. 30, 2018
Derivative Warrant Liability [Member]      
Cumulative effect adjustment   $ (8) $ (14)
Additional Paid-In Capital [Member]      
Cumulative effect adjustment   28
Accumulated Deficit [Member]      
Cumulative effect adjustment $ 20 $ 20 $ 14