Fair Value of Financial Instruments - Schedule of Valuation Techniques and Significant Unobservable Inputs Used to Determine Fair Value of Significant Level 3 Liabilities (Detail) - Debt Conversion Feature Liability [Member] - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Liabilities	$ 894,152	$ 731,048	$ 453,350	$ 1,286,621	$ 1,698,671	$ 2,370,903
Level 3 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value, Assets	0	0
Fair Value, Liabilities	$ 894,152	$ 731,048
Valuation Technique(s)	Black-Scholes-Merton option valuation model	Black-Scholes-Merton option valuation model
Level 3 [Member] | Black-Scholes-Merton Option Valuation Model [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Assumptions, Volatility	65.00%	61.00%
Fair Value Assumptions, Risk Free Rate	1.24%	0.57%