Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Schedule of Available Outstanding Shares for Future Issuance

At December 31, 2016, the following shares were outstanding and available for future issuance under the option plan:

Plan	Shares Outstanding		Shares Available for Issuance
2005 Equity Incentive Plan		17,000		—

Summary of Stock Option and Warrant Activities Issued to Employees and Directors

The following is a summary of stock option and warrant (employees and directors) activities issued during the years ended December 31, 2016 and 2015:

	Number of Options or Warrants			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)
Balance outstanding, January 1, 2015		1,914,906		$	2.44		8.74
Granted		5,534,692			0.67		8.85
Exercised		—			—		—
Cancelled (unvested)		(60,000	)		0.60		—
Expired (vested)		(52,000	)		28.76		—
Balance outstanding, December 31, 2015		7,337,598			0.94		8.62
Granted		4,823,736			0.71		7.75
Exercised		—			—		—
Cancelled (unvested)		—			—		—
Expired (vested)		(45,000	)		0.73		—
Balance outstanding, December 31, 2016		12,116,334		$	0.73		7.67
Balance exercisable, December 31, 2016		12,110,078		$	0.73		7.67

Schedule of Granted Stock Options and Warrants

The following table summarizes the stock options and warrants that we granted during the year ended December 31, 2016 and 2015:

Grant Date	Quantity Issued		Expected Life (Years)		Strike Price		Volatility			Dividend Yield			Risk-Free Interest Rate			Grant Date Fair Value Per Option		Aggregate Fair Value
09/23/2016		2,501,511		3.7	$	0.80		114.76	%		0	%		1.01	%	$	0.09	$	225,136
09/23/2016		2,233,336		4.2	$	0.60		115.10	%		0	%		1.11	%	$	0.11	$	245,667
09/23/2016		88,889		7.4	$	0.80		108.45	%		0	%		1.49	%	$	0.13	$	10,355

Grant Date	Quantity Issued		Expected Life (Years)		Strike Price		Volatility			Dividend Yield			Risk-Free Interest Rate			Grant Date Fair Value Per Option		Aggregate Fair Value
03/23/2015		1,125,000		5.0	$	0.60		96.32	%		0	%		1.42	%	$	0.10	$	117,683
03/23/2015		10,000		4.5	$	0.19		98.09	%		0	%		1.36	%	$	0.14	$	1,354
05/01/2015		550,000		5.2	$	0.60		99.45	%		0	%		1.47	%	$	0.37	$	203,500
05/08/2015		100,000		4.8	$	0.60		106.91	%		0	%		2.18	%	$	0.41	$	33,000
07/22/2015		71,192		8.6	$	0.80		95.11	%		0	%		2.23	%	$	0.23	$	16,328
07/22/2015		2,003,500		4.3	$	0.80		105.07	%		0	%		1.54	%	$	0.18	$	360,630
07/22/2015		1,675,000		4.8	$	0.60		100.05	%		0	%		1.69	%	$	0.19	$	318,250

Summary of Warrant Activities

The following table summarizes warrant activities for the years ended December 31, 2016 and 2015:

	Number of Warrants			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)
Balance outstanding, January 1, 2015		873,336		$	17.79		1.0
Warrants issued		—			—		—
Warrants exercised		—			—		—
Warrants expired		(156,588	)		26.07		—
Warrants cancelled		—			—		—
Balance outstanding, December 31, 2016		716,748			15.98		0.22
Warrants issued		—			—		—
Warrants exercised		—			—		—
Warrants expired		(716,748	)		15.98		—
Warrants cancelled		—			—		—
Balance outstanding, December 31, 2016		—		$	—		—
Warrants exercisable at December 31, 2016		—		$	—		—