Summary of Significant Accounting Policies - Reconciliation of Shares Used to Determine Net Income per Share (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share Disclosure [Line Items]
Net income (loss)	$ 4,763	$ (720)
Weighted average number of shares outstanding - basic	32,546,840	29,122,746
Weighted average number of shares outstanding - diluted	33,936,099	29,122,746
Warrants
Earnings Per Share Disclosure [Line Items]
Shares underlying	300,846	0
Options
Earnings Per Share Disclosure [Line Items]
Shares underlying	1,088,413	0