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Basis of Presentation - Calculations of Basic and Diluted Earnings per Share (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Mar. 14, 2014
Sep. 30, 2015
USD ($)
$ / shares
shares
Sep. 30, 2014
USD ($)
$ / shares
shares
Sep. 30, 2015
USD ($)
$ / shares
shares
Sep. 30, 2014
USD ($)
$ / shares
shares
Accounting Policies [Abstract]          
Stock split, conversion ratio 2        
Net loss | $   $ (8,654) $ (3,699) $ (27,233) $ (3,290)
Less: Undistributed loss allocated to participating securities | $   (87) (52) (274) (46)
Loss attributable to common stockholders | $   $ (8,567) $ (3,647) $ (26,959) $ (3,244)
Basic weighted-average common shares outstanding (in shares) | shares   21,687 21,536 21,757 21,522
Add: dilutive effect of equity instruments (in shares) | shares   0 0 0 0
Diluted weighted average shares outstanding (in shares) | shares   21,687 21,536 21,757 21,522
Loss per common share - basic (in dollars per share) | $ / shares   $ (0.40) $ (0.17) $ (1.24) $ (0.15)
Loss per common share - diluted (in dollars per share) | $ / shares   $ (0.40) $ (0.17) $ (1.24) $ (0.15)