Stockholders' Equity - Additional Information 1 (Detail) (USD $)			1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Apr. 30, 2013 Securities Purchase Agreement with Sabby Healthcare [Member]	Sep. 30, 2014 Securities Purchase Agreement with Sabby Healthcare [Member]	Apr. 30, 2013 Series A Preferred Stock [Member]	Sep. 30, 2014 Series A Preferred Stock [Member]	Apr. 30, 2013 Series A Preferred Stock [Member] Securities Purchase Agreement with Sabby Healthcare [Member]	Apr. 30, 2013 Series A Preferred Stock [Member] Securities Purchase Agreement [Member]	Jul. 31, 2013 Series A Convertible Preferred Stock [Member]	Apr. 30, 2013 Series A Convertible Preferred Stock [Member]	Sep. 30, 2014 Series A Convertible Preferred Stock [Member]	Dec. 31, 2013 Series A Convertible Preferred Stock [Member]
Stockholders Equity [Line Items]
Sell to the investor			4,012
Total purchase price							$ 4,000,000
Placement agent warrants issued under securities purchase agreement			44,087
Placement agent warrants, exercise price			$ 2.275
Placement agent warrants, expiration date				Aug. 27, 2015
Closing sell to the investor								2,356
Net proceeds from issuance of preferred stock					1,532,000			2,160,000
Second closing sell to the investor					1,656
Conversion of convertible preferred stock into common stock, shares converted						2,836
Conversion of convertible preferred stock into common stock, shares issued upon conversion	1,826,380	2,538,874				2,786,652
Convertible Preferred Stock outstanding						1,176					1,176	1,500
Convertible preferred stock, liquidation preference value					1,000						1,000	1,000
Maximum beneficial ownership percentage for conversion of preferred stock into common stock					9.99%
Conversion price of preferred stock after effect of reverse stock split					$ 1.82
Conversion price of preferred stock subsequently reset					$ 0.6437
Weighted average price exceeds of common stock					$ 12.00
Convertible preferred stock basis						Right to force conversion if the volume weighted average price for our common stock exceeds $12.00 per share for 25 trading days during a 30 consecutive trading day period and certain other equity conditions are met.
Deemed preferred dividend feature amount									$ 172,861	$ 233,011