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Net Loss Per Common Share - Earning Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 2 Months Ended 3 Months Ended 10 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Oct. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Numerator:                          
Net loss $ (196) $ (7,214) $ (3,878) $ (1,391) $ (2,103) $ (2,570) $ (2,569) $ (1,611) $ (2,279) $ (124) $ (14,586) $ (9,029) $ (320)
Adjustment to redemption value on Series A convertible preferred stock     (67) (150) (149) (150) (152) (149) (2,517)   (366) (2,968)  
Premium upon substantial modification of convertible notes with certain stockholders           (1,047)           (1,047)  
Net loss attributable to common stockholders   $ (7,214) $ (3,945) $ (1,541) $ (2,252) $ (3,767) $ (2,721) $ (1,760) $ (4,796)   $ (14,952) $ (13,044) $ (320)
Denominator:                          
Basic and diluted weighted average common shares outstanding                     5,809,396 2,875,053 1,521,703
Basic and diluted net loss per share   $ (0.78) $ (0.56) $ (0.42) $ (0.65) $ (1.14) $ (0.87) $ (0.60) $ (2.27)   $ (2.57) $ (4.54) $ (0.21)