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Consolidated Statements of Shareholder's Equity (Parenthetical) - shares
6 Months Ended 12 Months Ended
Nov. 28, 2016
Jun. 30, 2018
Dec. 31, 2017
Dec. 31, 2016
Temporary equity   721,107 721,107 721,107
Reverse stock split one-to-nine Reverse Stock Split      
September 4, 2018 [Member]        
Reverse stock split   1:15 reverse Stock Split 1:15 reverse Stock Split 1:15 reverse Stock Split