Stockholders' Equity - Additional Information 1 (Detail) - USD ($)			12 Months Ended
	Jul. 22, 2015	Apr. 04, 2013	Dec. 31, 2015	Dec. 31, 2014
Stockholders Equity [Line Items]
Common stock, shares outstanding			13,187,544	12,775,044
Deemed dividend on preferred stock			$ 627,705
Total stock-based compensation			$ 985,114	$ 508,628
Series A Convertible Preferred Stock [Member]
Stockholders Equity [Line Items]
Series A Convertible Preferred stock, shares authorized			40,000,000	40,000,000
Series A Convertible Preferred stock, shares outstanding			1,041	1,176
Preferred stock converted into common stock			3,468,804	1,826,381
Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Stockholders Equity [Line Items]
Common stock, shares outstanding	16,656,348		13,187,544
Increase in common stock outstanding, percentage	26.00%
Granted common stock purchase warrants	3,585,908
Additional warrant shares to be granted	3,749,692
Common stock purchase warrants outstanding with anti-dilutive provisions	7,235,600
Weighted average price of warrant	$ 0.71
Total stock-based compensation			$ 693,801
Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member] | Series A Convertible Preferred Stock [Member]
Stockholders Equity [Line Items]
Effective conversion price per share	$ 0.30
Series A Convertible Preferred stock, shares outstanding	1,176
Stated value per share for redemption	$ 1,000
Preferred stock redemption period	120 days
Maximum limit on indebtedness	$ 250,000
Preferred stock converted into common stock	3,918,667
Additional preferred stock converted into common stock	2,092,350
Deemed dividend on preferred stock	$ 627,705
Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member] | Series A Convertible Preferred Stock [Member] | Maximum [Member]
Stockholders Equity [Line Items]
Effective conversion price per share	$ 0.64
Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member] | Series A Convertible Preferred Stock [Member] | Minimum [Member]
Stockholders Equity [Line Items]
Effective conversion price per share	$ 0.30
Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member] | Share Purchase Agreement [Member] | Maximum [Member]
Stockholders Equity [Line Items]
Percentage of common stock issued and outstanding		10.00%
Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member] | Share Purchase Agreement [Member] | Series A Convertible Preferred Stock [Member]
Stockholders Equity [Line Items]
Series A Convertible Preferred stock, shares authorized		4,012
Effective conversion price per share		$ 0.6437
Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member] | Share Purchase Agreement [Member] | Series A Convertible Preferred Stock [Member] | Maximum [Member]
Stockholders Equity [Line Items]
Proceeds from issuance of preferred stock		$ 4,000,000
Hypothetical Conversion on Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member] | Series A Convertible Preferred Stock [Member]
Stockholders Equity [Line Items]
Preferred stock converted into common stock	3,468,804