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Significant and Critical Accounting Policies and Practices - Summary of Cash and Restricted Cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accounting Policies [Abstract]      
Cash $ 518 $ 562  
Restricted cash 15 15  
Long-term deposit 35 35  
Total cash and restricted cash $ 568 $ 612 $ 592