Summary of Significant Accounting Policies - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accounting Policies [Abstract]
Percentage of inventory reserve	100.00%		100.00%
Preferred stock converted into common stock	5,354,574	3,718,804	5,354,574	3,718,804
Outstanding stock options and warrants	12,116,334	7,353,848	12,116,334	7,353,848	7,337,598
Dilutive securities not included in calculation of loss per common share	0	0	0	0