Subsequent Events - Additional Information (Detail) - USD ($)								6 Months Ended
	Mar. 06, 2017	Sep. 28, 2016	Sep. 23, 2016	Jul. 05, 2016	Mar. 18, 2016	Jul. 22, 2015	Apr. 04, 2013	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Subsequent Event [Line Items]
Proceeds from issuance of preferred stock								$ 250,000
Preferred stock converted into common stock								3,413,804		1,826,317
Common stock, shares outstanding								13,242,544	13,187,544
Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Subsequent Event [Line Items]
Common stock, shares outstanding						16,656,348		13,242,544
Increase in common stock outstanding, percentage						26.00%
Additional warrants issue to warrant holders						3,749,692
Series A Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock, shares issued								1,024	1,041
Series A Convertible Preferred stock, shares outstanding								1,024	1,041
Series A Convertible Preferred Stock [Member] | Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Subsequent Event [Line Items]
Series A Convertible Preferred stock, shares outstanding						1,176
Effective conversion price per share						$ 0.30
Stated value per share for redemption						$ 1,000
Preferred stock converted into common stock						3,918,667
Additional preferred stock converted into common stock						2,092,350
Series A Convertible Preferred Stock [Member] | Minimum [Member] | Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Subsequent Event [Line Items]
Effective conversion price per share						$ 0.30
Series A Convertible Preferred Stock [Member] | Maximum [Member] | Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Subsequent Event [Line Items]
Effective conversion price per share						$ 0.64
Share Purchase Agreement [Member] | Series A Convertible Preferred Stock [Member] | Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Subsequent Event [Line Items]
Proceeds from issuance of preferred stock							$ 4,000,000
Effective conversion price per share							$ 0.6437
Share Purchase Agreement [Member] | Angionetics Inc. [Member] | Series A Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Proceeds from issuance of preferred stock					$ 250,000
Subsequent Event [Member] | Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Subsequent Event [Line Items]
Common stock, shares outstanding	18,778,218		14,173,544
Increase in common stock outstanding, percentage	32.00%
Additional warrants issue to warrant holders			4,823,733
Subsequent Event [Member] | Series A Convertible Preferred Stock [Member] | Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Subsequent Event [Line Items]
Series A Convertible Preferred stock, shares outstanding	829		1,000
Effective conversion price per share			$ 0.18
Stated value per share for redemption			$ 1,000
Preferred stock redemption date			Nov. 29, 2016
Preferred stock converted into common stock	4,604,674		5,554,667
Additional preferred stock converted into common stock			2,221,867
Subsequent Event [Member] | Series A Convertible Preferred Stock [Member] | Minimum [Member] | Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Subsequent Event [Line Items]
Effective conversion price per share			$ 0.18
Subsequent Event [Member] | Series A Convertible Preferred Stock [Member] | Maximum [Member] | Exchange and Redemption Agreement with Sabby Healthcare Volatility Master Fund, Ltd. [Member]
Subsequent Event [Line Items]
Effective conversion price per share			$ 0.30
Subsequent Event [Member] | Angionetics Inc. [Member] | Series A Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock, shares issued		400,000
Proceeds from issuance of preferred stock		$ 2,000,000
Subsequent Event [Member] | Share Purchase Agreement [Member] | Angionetics Inc. [Member] | Series A Convertible Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred stock, shares issued				200,000
Proceeds from issuance of preferred stock				$ 750,000