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Consolidated Balance Sheets (Parenthetical) - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Dec. 31, 2016
Temporary equity, par value $ 0.01 $ 0.01 $ 0.01
Temporary equity, shares issued 721,107 721,107 721,107
Temporary equity, shares outstanding 721,107 721,107 721,107
Preferred stock, par value $ 0.01 $ 0.01 $ 0.01
Preferred stock, shares authorized 1,000,000 1,000,000 1,000,000
Preferred stock, shares issued 1,001 4,001 9,736
Preferred stock, shares outstanding 1,001 4,001 9,736
Common stock, par value $ 0.01 $ 0.01 $ 0.01
Common stock, shares authorized 220,000,000 220,000,000 220,000,000
Common stock, shares issued 2,224,569 [1] 2,013,193 [2],[3] 1,067,777 [2]
Common stock, shares outstanding 2,224,569 [1] 2,013,193 [1],[2] 1,067,777 [2]
September 4, 2018 [Member]      
Reverse stock split 1:15 reverse Stock Split 1:15 reverse Stock Split 1:15 reverse Stock Split
[1] Share data represents the number of shares adjusted to retroactively reflect the 1:15 reverse Stock Split effected on September 4, 2018, as discussed in Note 1.
[2] December 31 2017 and 2016 share data represents the number of shares adjusted to retroactively reflect the 1:15 reverse Stock Split effected on September 4, 2018, as discussed in Note 1.
[3] Share data represents the number of shares adjusted to retroactively reflect the 1:15 reverse Stock Split effected on September 4, 2018.