Stock Warrants - Additional information (Detail) - USD ($)				6 Months Ended
	Sep. 29, 2015	Jun. 04, 2014	May. 20, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Class of Warrant or Right [Line Items]
Warrant liability					$ 0	$ 400,000
PfG [Member]
Class of Warrant or Right [Line Items]
Warrants issued, shares called in		129,032
Warrant exercises during period		57,196
Common stock issued, warrants exercise		35,862
Remaining exercisable warrants		71,836			0
PFG Equity Investors, LLC [Member]
Class of Warrant or Right [Line Items]
Warrants issued, shares called in		10,322
Warrant exercises during period		4,945
Common stock issued, warrants exercise		3,100
Remaining exercisable warrants		5,377			0
Silicon Valley Bank [Member]
Class of Warrant or Right [Line Items]
Warrant exercises during period			75,698
Remaining exercisable warrants					0
Additional Paid-in Capital, Attributable to Convertible Option [Member]
Class of Warrant or Right [Line Items]
Consideration for warrants				$ 4,000
Additional Paid-in Capital, Attributable to Convertible Option [Member] | PfG [Member]
Class of Warrant or Right [Line Items]
Warrants issued, value				$ 360,000
Warrants issued, shares called in				129,032
Common stock issued, warrants exercise	46,689
Additional Paid-in Capital, Attributable to Convertible Option [Member] | PFG Equity Investors, LLC [Member]
Class of Warrant or Right [Line Items]
Warrants issued, value				$ 28,800
Warrants issued, shares called in				10,322
Common stock issued, warrants exercise	3,495
Additional Paid-in Capital, Attributable to Convertible Option [Member] | Silicon Valley Bank [Member]
Class of Warrant or Right [Line Items]
Warrants issued, value				$ 211,200
Warrants issued, shares called in				75,698
Common stock issued, warrants exercise			47,404