Earnings Per Common Share - Summary of Reconciliation of Earnings (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Basic Earnings (Loss) per Common Share:
Net loss	$ (5,283)	$ (4,012)	$ (10,718)	$ (8,162)
Distributed earnings to common shares	0	0	0	0
Distributed earnings to participating securities	0	0	0	0
Total distributed earnings	0	0	0	0
Undistributed loss allocable to common shares	(5,283)	(4,012)	(10,718)	(8,162)
Undistributed earnings allocable to participating securities	0	0	0	0
Total undistributed loss	(5,283)	(4,012)	(10,718)	(8,162)
Loss to common shares—basic	$ (5,283)	$ (4,012)	$ (10,718)	$ (8,162)
Weighted average common shares outstanding—basic	8,587	8,029	8,560	7,995
Basic earnings (loss) per common share	$ (0.62)	$ (0.50)	$ (1.25)	$ (1.02)
Diluted Earnings (Loss) per Common Share:
Loss to common shares—basic	$ (5,283)	$ (4,012)	$ (10,718)	$ (8,162)
Undistributed earnings allocated to participating securities	0	0	0	0
Undistributed earnings reallocated to participating securities	0	0	0	0
Loss to common shares—diluted	$ (5,283)	$ (4,012)	$ (10,718)	$ (8,162)
Weighted average common shares outstanding—basic	8,587	8,029	8,560	7,995
Dilutive effect of stock options	0	0	0	0
Weighted average common shares outstanding—dilutive	8,587	8,029	8,560	7,995
Diluted earnings (loss) per common share	$ (0.62)	$ (0.50)	$ (1.25)	$ (1.02)