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Losses per Share - 6K (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Earnings per Share [Abstract]          
Net loss $ (17,730) $ (3,105) $ (8,956) $ 80,348 $ 10,907
Weighted average common shares outstanding - basic and diluted (in shares) 19,594,354 8,130,931      
Net loss per common share - basic and diluted (in dollars per share) $ (0.90) $ (0.38) $ (0.83) $ 30.06 $ 4.56
Losses per Share [Abstract]          
Antidilutive securities not included in computation of diluted EPS (in shares) 27,882,890 7,333,333 17,446,444 15,185 15,185
Non-vested Equity Incentive Plan Shares [Member]          
Losses per Share [Abstract]          
Antidilutive securities not included in computation of diluted EPS (in shares) 144,000 0 152,000 0 0
Convertible Promissory Note Shares [Member]          
Losses per Share [Abstract]          
Antidilutive securities not included in computation of diluted EPS (in shares) 27,738,890 7,333,333 17,294,444 0 0