Stockholders' Equity - Additional Information - Stock Option (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Stockholders Equity [Line Items]
Options outstanding, intrinsic value	$ 0	$ 0
Options exercisable, intrinsic value	0	0
Stock-based compensation expense	1,315,530	$ 1,085,217
Unvested share-based awards	$ 2,408,855
Expected weighted average period to recognize unearned stock-based compensation	1 year
Stock Options [Member]
Schedule Of Stockholders Equity [Line Items]
Weighted-average grant-date fair value	$ 0.55	$ 1.41