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Income Taxes - Schedule of Components of Provision for Income Tax (Benefits) are Attributable to Continuing Operations (Detail) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current      
Federal $ 0 $ 0 $ 0
State 0 0 0
Total 0 0 0
Deferred      
Federal 0 0 0
State 0 0 0
Total $ 0 $ 0 $ 0